85393179317 has 2 divisors, whose sum is σ = 85393179318. Its totient is φ = 85393179316.

The previous prime is 85393179293. The next prime is 85393179337. The reversal of 85393179317 is 71397139358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85389021796 + 4157521 = 292214^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 85393179317 - 2⁸ = 85393179061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85393179337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42696589658 + 42696589659.

It is an arithmetic number, because the mean of its divisors is an integer number (42696589659).

Almost surely, 2^85393179317 is an apocalyptic number.

It is an amenable number.

85393179317 is a deficient number, since it is larger than the sum of its proper divisors (1).

85393179317 is an equidigital number, since it uses as much as digits as its factorization.

85393179317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4286520, while the sum is 56.

The spelling of 85393179317 in words is "eighty-five billion, three hundred ninety-three million, one hundred seventy-nine thousand, three hundred seventeen".