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23003137 = 29378509
BaseRepresentation
bin101011111000…
…0000000000001
31121021200101001
41113300000001
521342100022
62141012001
7366344353
oct127600001
947250331
1023003137
1111a91663
127854001
1349c5331
1430ab0d3
152045b27
hex15f0001

23003137 has 4 divisors (see below), whose sum is σ = 23081940. Its totient is φ = 22924336.

The previous prime is 23003131. The next prime is 23003143. The reversal of 23003137 is 73130032.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (23003131) and next prime (23003143).

It can be written as a sum of positive squares in 2 ways, for example, as 21678336 + 1324801 = 4656^2 + 1151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-23003137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23003131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38962 + ... + 39547.

It is an arithmetic number, because the mean of its divisors is an integer number (5770485).

It is a Proth number, since it is equal to 351 ⋅ 216 + 1 and 351 < 216.

Almost surely, 223003137 is an apocalyptic number.

It is an amenable number.

23003137 is a deficient number, since it is larger than the sum of its proper divisors (78803).

23003137 is an equidigital number, since it uses as much as digits as its factorization.

23003137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78802.

The product of its (nonzero) digits is 378, while the sum is 19.

The square root of 23003137 is about 4796.1585670201. The cubic root of 23003137 is about 284.3996266883.

Adding to 23003137 its reverse (73130032), we get a palindrome (96133169).

The spelling of 23003137 in words is "twenty-three million, three thousand, one hundred thirty-seven".

Divisors: 1 293 78509 23003137