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30023023 = 107280589
BaseRepresentation
bin111001010000…
…1110101101111
32002111022211211
41302201311233
530141214043
62551255251
7513122452
oct162416557
962438754
1030023023
1115a46818
12a07a527
1362b2604
143db7499
152980a9d
hex1ca1d6f

30023023 has 4 divisors (see below), whose sum is σ = 30303720. Its totient is φ = 29742328.

The previous prime is 30023017. The next prime is 30023039. The reversal of 30023023 is 32032003.

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

It is a cyclic number.

It is not a de Polignac number, because 30023023 - 25 = 30022991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30022994 and 30023012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30023923) 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, 140188 + ... + 140401.

It is an arithmetic number, because the mean of its divisors is an integer number (7575930).

Almost surely, 230023023 is an apocalyptic number.

30023023 is a deficient number, since it is larger than the sum of its proper divisors (280697).

30023023 is a wasteful number, since it uses less digits than its factorization.

30023023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280696.

The product of its (nonzero) digits is 108, while the sum is 13.

The square root of 30023023 is about 5479.3268747174. The cubic root of 30023023 is about 310.8027167305.

Adding to 30023023 its reverse (32032003), we get a palindrome (62055026).

The spelling of 30023023 in words is "thirty million, twenty-three thousand, twenty-three".

Divisors: 1 107 280589 30023023