71946731 has 2 divisors, whose sum is σ = 71946732. Its totient is φ = 71946730.

The previous prime is 71946727. The next prime is 71946739. The reversal of 71946731 is 13764917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71946731 - 2² = 71946727 is a prime.

It is a super-2 number, since 2×71946731² = 10352664203172722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71946739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35973365 + 35973366.

It is an arithmetic number, because the mean of its divisors is an integer number (35973366).

Almost surely, 2^71946731 is an apocalyptic number.

71946731 is a deficient number, since it is larger than the sum of its proper divisors (1).

71946731 is an equidigital number, since it uses as much as digits as its factorization.

71946731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 71946731 is about 8482.1418875187. The cubic root of 71946731 is about 415.9141430156.

The spelling of 71946731 in words is "seventy-one million, nine hundred forty-six thousand, seven hundred thirty-one".