71695979 has 2 divisors, whose sum is σ = 71695980. Its totient is φ = 71695978.

The previous prime is 71695957. The next prime is 71696029. The reversal of 71695979 is 97959617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71695979 - 2¹⁶ = 71630443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71695979.

It is not a weakly prime, because it can be changed into another prime (71692979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35847989 + 35847990.

It is an arithmetic number, because the mean of its divisors is an integer number (35847990).

Almost surely, 2^71695979 is an apocalyptic number.

71695979 is a deficient number, since it is larger than the sum of its proper divisors (1).

71695979 is an equidigital number, since it uses as much as digits as its factorization.

71695979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1071630, while the sum is 53.

The square root of 71695979 is about 8467.3478138081. The cubic root of 71695979 is about 415.4303929914.

The spelling of 71695979 in words is "seventy-one million, six hundred ninety-five thousand, nine hundred seventy-nine".