23431749 has 8 divisors (see below), whose sum is σ = 34082592. Its totient is φ = 14201040.

The previous prime is 23431721. The next prime is 23431757. The reversal of 23431749 is 94713432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23431749 - 2²⁰ = 22383173 is a prime.

It is a super-2 number, since 2×23431749² = 1098093722398002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 710053 = 23431749 / (2 + 3 + 4 + 3 + 1 + 7 + 4 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23435749) 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 7 ways as a sum of consecutive naturals, for example, 354994 + ... + 355059.

It is an arithmetic number, because the mean of its divisors is an integer number (4260324).

Almost surely, 2^23431749 is an apocalyptic number.

It is an amenable number.

23431749 is a deficient number, since it is larger than the sum of its proper divisors (10650843).

23431749 is a wasteful number, since it uses less digits than its factorization.

23431749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710067.

The product of its digits is 18144, while the sum is 33.

The square root of 23431749 is about 4840.6351855929. The cubic root of 23431749 is about 286.1551516067.

The spelling of 23431749 in words is "twenty-three million, four hundred thirty-one thousand, seven hundred forty-nine".