71236913 has 16 divisors (see below), whose sum is σ = 79847424. Its totient is φ = 62999760.

The previous prime is 71236901. The next prime is 71236931. The reversal of 71236913 is 31963217.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71236913 - 2¹⁴ = 71220529 is a prime.

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 71236913.

It is not an unprimeable number, because it can be changed into a prime (71236933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117056 + ... + 117662.

It is an arithmetic number, because the mean of its divisors is an integer number (4990464).

Almost surely, 2^71236913 is an apocalyptic number.

It is an amenable number.

71236913 is a deficient number, since it is larger than the sum of its proper divisors (8610511).

71236913 is a wasteful number, since it uses less digits than its factorization.

71236913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its digits is 6804, while the sum is 32.

The square root of 71236913 is about 8440.1962654905. The cubic root of 71236913 is about 414.5418333574.

The spelling of 71236913 in words is "seventy-one million, two hundred thirty-six thousand, nine hundred thirteen".