71713931 has 4 divisors (see below), whose sum is σ = 74831952. Its totient is φ = 68595912.

The previous prime is 71713913. The next prime is 71713951. The reversal of 71713931 is 13931717.

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 71713931 - 2⁶ = 71713867 is a prime.

It is a super-2 number, since 2×71713931² = 10285775798945522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71713951) 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, 1558976 + ... + 1559021.

It is an arithmetic number, because the mean of its divisors is an integer number (18707988).

Almost surely, 2^71713931 is an apocalyptic number.

71713931 is a deficient number, since it is larger than the sum of its proper divisors (3118021).

71713931 is a wasteful number, since it uses less digits than its factorization.

71713931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118020.

The product of its digits is 3969, while the sum is 32.

The square root of 71713931 is about 8468.4078196554. The cubic root of 71713931 is about 415.4650633878.

The spelling of 71713931 in words is "seventy-one million, seven hundred thirteen thousand, nine hundred thirty-one".