71686963 has 2 divisors, whose sum is σ = 71686964. Its totient is φ = 71686962.

The previous prime is 71686957. The next prime is 71686991. The reversal of 71686963 is 36968617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71686963 - 2⁵ = 71686931 is a prime.

It is not a weakly prime, because it can be changed into another prime (71686913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35843481 + 35843482.

It is an arithmetic number, because the mean of its divisors is an integer number (35843482).

Almost surely, 2^71686963 is an apocalyptic number.

71686963 is a deficient number, since it is larger than the sum of its proper divisors (1).

71686963 is an equidigital number, since it uses as much as digits as its factorization.

71686963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 71686963 is about 8466.8153989561. The cubic root of 71686963 is about 415.4129783586.

The spelling of 71686963 in words is "seventy-one million, six hundred eighty-six thousand, nine hundred sixty-three".