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12913973 = 15185523
BaseRepresentation
bin110001010000…
…110100110101
3220022002122022
4301100310311
511301221343
61140442525
7214524032
oct61206465
926262568
1012913973
117320506
1243a9445
1328a2007
141a02389
151201568
hexc50d35

12913973 has 4 divisors (see below), whose sum is σ = 12999648. Its totient is φ = 12828300.

The previous prime is 12913969. The next prime is 12913981. The reversal of 12913973 is 37931921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12913973 - 22 = 12913969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12913913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42611 + ... + 42912.

It is an arithmetic number, because the mean of its divisors is an integer number (3249912).

Almost surely, 212913973 is an apocalyptic number.

It is an amenable number.

12913973 is a deficient number, since it is larger than the sum of its proper divisors (85675).

12913973 is an equidigital number, since it uses as much as digits as its factorization.

12913973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85674.

The product of its digits is 10206, while the sum is 35.

The square root of 12913973 is about 3593.6016752000. The cubic root of 12913973 is about 234.6136582429.

The spelling of 12913973 in words is "twelve million, nine hundred thirteen thousand, nine hundred seventy-three".

Divisors: 1 151 85523 12913973