71394794677 has 2 divisors, whose sum is σ = 71394794678. Its totient is φ = 71394794676.

The previous prime is 71394794593. The next prime is 71394794729. The reversal of 71394794677 is 77649749317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54088339761 + 17306454916 = 232569^2 + 131554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71394794677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71394794077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35697397338 + 35697397339.

It is an arithmetic number, because the mean of its divisors is an integer number (35697397339).

Almost surely, 2^71394794677 is an apocalyptic number.

It is an amenable number.

71394794677 is a deficient number, since it is larger than the sum of its proper divisors (1).

71394794677 is an equidigital number, since it uses as much as digits as its factorization.

71394794677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56010528, while the sum is 64.

The spelling of 71394794677 in words is "seventy-one billion, three hundred ninety-four million, seven hundred ninety-four thousand, six hundred seventy-seven".