86357197 has 2 divisors, whose sum is σ = 86357198. Its totient is φ = 86357196.

The previous prime is 86357143. The next prime is 86357209. The reversal of 86357197 is 79175368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81468676 + 4888521 = 9026^2 + 2211^2 .

It is a cyclic number.

It is not a de Polignac number, because 86357197 - 2⁷ = 86357069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86357107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43178598 + 43178599.

It is an arithmetic number, because the mean of its divisors is an integer number (43178599).

Almost surely, 2^86357197 is an apocalyptic number.

It is an amenable number.

86357197 is a deficient number, since it is larger than the sum of its proper divisors (1).

86357197 is an equidigital number, since it uses as much as digits as its factorization.

86357197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 86357197 is about 9292.8573108598. The cubic root of 86357197 is about 442.0107642595.

The spelling of 86357197 in words is "eighty-six million, three hundred fifty-seven thousand, one hundred ninety-seven".