85899497279 has 2 divisors, whose sum is σ = 85899497280. Its totient is φ = 85899497278.

The previous prime is 85899497267. The next prime is 85899497377. The reversal of 85899497279 is 97279499858.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85899497279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85899497239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42949748639 + 42949748640.

It is an arithmetic number, because the mean of its divisors is an integer number (42949748640).

Almost surely, 2^85899497279 is an apocalyptic number.

85899497279 is a deficient number, since it is larger than the sum of its proper divisors (1).

85899497279 is an equidigital number, since it uses as much as digits as its factorization.

85899497279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 823011840, while the sum is 77.

The spelling of 85899497279 in words is "eighty-five billion, eight hundred ninety-nine million, four hundred ninety-seven thousand, two hundred seventy-nine".