85973911391 has 2 divisors, whose sum is σ = 85973911392. Its totient is φ = 85973911390.

The previous prime is 85973911291. The next prime is 85973911403. The reversal of 85973911391 is 19311937958.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85973911391 - 2³⁰ = 84900169567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85973911291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42986955695 + 42986955696.

It is an arithmetic number, because the mean of its divisors is an integer number (42986955696).

Almost surely, 2^85973911391 is an apocalyptic number.

85973911391 is a deficient number, since it is larger than the sum of its proper divisors (1).

85973911391 is an equidigital number, since it uses as much as digits as its factorization.

85973911391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 56.

The spelling of 85973911391 in words is "eighty-five billion, nine hundred seventy-three million, nine hundred eleven thousand, three hundred ninety-one".