71349931 has 8 divisors (see below), whose sum is σ = 72772128. Its totient is φ = 69936000.

The previous prime is 71349923. The next prime is 71349953. The reversal of 71349931 is 13994317.

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 71349931 - 2³ = 71349923 is a prime.

It is a super-2 number, since 2×71349931² = 10181625307409522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71349911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17091 + ... + 20851.

It is an arithmetic number, because the mean of its divisors is an integer number (9096516).

Almost surely, 2^71349931 is an apocalyptic number.

71349931 is a deficient number, since it is larger than the sum of its proper divisors (1422197).

71349931 is a wasteful number, since it uses less digits than its factorization.

71349931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133.

The product of its digits is 20412, while the sum is 37.

The square root of 71349931 is about 8446.8888355418. Note that the first 4 decimals coincide. The cubic root of 71349931 is about 414.7609423016.

The spelling of 71349931 in words is "seventy-one million, three hundred forty-nine thousand, nine hundred thirty-one".