85973911291 has 2 divisors, whose sum is σ = 85973911292. Its totient is φ = 85973911290.

The previous prime is 85973911229. The next prime is 85973911391. The reversal of 85973911291 is 19211937958.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85973911291 - 2²⁹ = 85437040379 is a prime.

It is not a weakly prime, because it can be changed into another prime (85973911391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42986955645 + 42986955646.

It is an arithmetic number, because the mean of its divisors is an integer number (42986955646).

Almost surely, 2^85973911291 is an apocalyptic number.

85973911291 is a deficient number, since it is larger than the sum of its proper divisors (1).

85973911291 is an equidigital number, since it uses as much as digits as its factorization.

85973911291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 55.

The spelling of 85973911291 in words is "eighty-five billion, nine hundred seventy-three million, nine hundred eleven thousand, two hundred ninety-one".