71313939 has 12 divisors (see below), whose sum is σ = 106824536. Its totient is φ = 47542464.

The previous prime is 71313923. The next prime is 71313971. The reversal of 71313939 is 93931317.

It is not a de Polignac number, because 71313939 - 2⁴ = 71313923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71313989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146494 + ... + 146979.

Almost surely, 2^71313939 is an apocalyptic number.

71313939 is a deficient number, since it is larger than the sum of its proper divisors (35510597).

71313939 is an equidigital number, since it uses as much as digits as its factorization.

71313939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293488 (or 293476 counting only the distinct ones).

The product of its digits is 15309, while the sum is 36.

The square root of 71313939 is about 8444.7580782400. The cubic root of 71313939 is about 414.6911894350.

The spelling of 71313939 in words is "seventy-one million, three hundred thirteen thousand, nine hundred thirty-nine".