23156749 has 16 divisors (see below), whose sum is σ = 28993536. Its totient is φ = 17967600.

The previous prime is 23156743. The next prime is 23156767. The reversal of 23156749 is 94765132.

It is not a de Polignac number, because 23156749 - 2⁷ = 23156621 is a prime.

Its product of digits (45360) is a multiple of the sum of its prime divisors (1296).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23156743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23464 + ... + 24430.

It is an arithmetic number, because the mean of its divisors is an integer number (1812096).

Almost surely, 2^23156749 is an apocalyptic number.

It is an amenable number.

23156749 is a deficient number, since it is larger than the sum of its proper divisors (5836787).

23156749 is a wasteful number, since it uses less digits than its factorization.

23156749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296.

The product of its digits is 45360, while the sum is 37.

The square root of 23156749 is about 4812.1459869792. The cubic root of 23156749 is about 285.0312841415.

The spelling of 23156749 in words is "twenty-three million, one hundred fifty-six thousand, seven hundred forty-nine".