104172731 has 4 divisors (see below), whose sum is σ = 112186032. Its totient is φ = 96159432.

The previous prime is 104172721. The next prime is 104172749. The reversal of 104172731 is 137271401.

It is a happy number.

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 104172731 - 2¹⁰ = 104171707 is a prime.

It is a super-2 number, since 2×104172731² = 21703915767996722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 104172731.

It is not an unprimeable number, because it can be changed into a prime (104172721) 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, 4006631 + ... + 4006656.

It is an arithmetic number, because the mean of its divisors is an integer number (28046508).

Almost surely, 2^104172731 is an apocalyptic number.

104172731 is a deficient number, since it is larger than the sum of its proper divisors (8013301).

104172731 is an equidigital number, since it uses as much as digits as its factorization.

104172731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8013300.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 104172731 is about 10206.5043477187. The cubic root of 104172731 is about 470.5271450732.

The spelling of 104172731 in words is "one hundred four million, one hundred seventy-two thousand, seven hundred thirty-one".