85999999997 has 2 divisors, whose sum is σ = 85999999998. Its totient is φ = 85999999996.

The previous prime is 85999999937. The next prime is 86000000003. The reversal of 85999999997 is 79999999958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83090368516 + 2909631481 = 288254^2 + 53941^2 .

It is a cyclic number.

It is not a de Polignac number, because 85999999997 - 2²⁰ = 85998951421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85999999937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42999999998 + 42999999999.

It is an arithmetic number, because the mean of its divisors is an integer number (42999999999).

Almost surely, 2^85999999997 is an apocalyptic number.

It is an amenable number.

85999999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

85999999997 is an equidigital number, since it uses as much as digits as its factorization.

85999999997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12053081880, while the sum is 92.

The spelling of 85999999997 in words is "eighty-five billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-seven".