23172739 has 8 divisors (see below), whose sum is σ = 23780160. Its totient is φ = 22570176.

The previous prime is 23172731. The next prime is 23172763. The reversal of 23172739 is 93727132.

23172739 is nontrivially palindromic in base 12.

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

It is a cyclic number.

It is not a de Polignac number, because 23172739 - 2³ = 23172731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23172731) 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, 9687 + ... + 11839.

It is an arithmetic number, because the mean of its divisors is an integer number (2972520).

Almost surely, 2^23172739 is an apocalyptic number.

23172739 is a deficient number, since it is larger than the sum of its proper divisors (607421).

23172739 is a wasteful number, since it uses less digits than its factorization.

23172739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429.

The product of its digits is 15876, while the sum is 34.

The square root of 23172739 is about 4813.8071211880. The cubic root of 23172739 is about 285.0968748339.

The spelling of 23172739 in words is "twenty-three million, one hundred seventy-two thousand, seven hundred thirty-nine".