85570997 has 2 divisors, whose sum is σ = 85570998. Its totient is φ = 85570996.

The previous prime is 85570987. The next prime is 85571011. The reversal of 85570997 is 79907558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61058596 + 24512401 = 7814^2 + 4951^2 .

It is a cyclic number.

It is not a de Polignac number, because 85570997 - 2²⁰ = 84522421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85570907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42785498 + 42785499.

It is an arithmetic number, because the mean of its divisors is an integer number (42785499).

Almost surely, 2^85570997 is an apocalyptic number.

It is an amenable number.

85570997 is a deficient number, since it is larger than the sum of its proper divisors (1).

85570997 is an equidigital number, since it uses as much as digits as its factorization.

85570997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 793800, while the sum is 50.

The square root of 85570997 is about 9250.4592858949. The cubic root of 85570997 is about 440.6653106457.

The spelling of 85570997 in words is "eighty-five million, five hundred seventy thousand, nine hundred ninety-seven".