731696123 has 4 divisors (see below), whose sum is σ = 739239480. Its totient is φ = 724152768.

The previous prime is 731696117. The next prime is 731696221. The reversal of 731696123 is 321696137.

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 731696123 - 2⁴ = 731696107 is a prime.

It is a super-2 number, since 2×731696123² = 1070758432826462258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (731696113) 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, 3771533 + ... + 3771726.

It is an arithmetic number, because the mean of its divisors is an integer number (184809870).

Almost surely, 2^731696123 is an apocalyptic number.

731696123 is a deficient number, since it is larger than the sum of its proper divisors (7543357).

731696123 is an equidigital number, since it uses as much as digits as its factorization.

731696123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543356.

The product of its digits is 40824, while the sum is 38.

The square root of 731696123 is about 27049.8821254363. The cubic root of 731696123 is about 901.1081506358.

The spelling of 731696123 in words is "seven hundred thirty-one million, six hundred ninety-six thousand, one hundred twenty-three".