71940731 has 2 divisors, whose sum is σ = 71940732. Its totient is φ = 71940730.

The previous prime is 71940727. The next prime is 71940809. The reversal of 71940731 is 13704917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71940731 - 2² = 71940727 is a prime.

It is a super-2 number, since 2×71940731² = 10350937553628722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71940721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35970365 + 35970366.

It is an arithmetic number, because the mean of its divisors is an integer number (35970366).

Almost surely, 2^71940731 is an apocalyptic number.

71940731 is a deficient number, since it is larger than the sum of its proper divisors (1).

71940731 is an equidigital number, since it uses as much as digits as its factorization.

71940731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 71940731 is about 8481.7881958936. The cubic root of 71940731 is about 415.9025809696.

The spelling of 71940731 in words is "seventy-one million, nine hundred forty thousand, seven hundred thirty-one".