86855497 has 2 divisors, whose sum is σ = 86855498. Its totient is φ = 86855496.

The previous prime is 86855477. The next prime is 86855501. The reversal of 86855497 is 79455868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77951241 + 8904256 = 8829^2 + 2984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86855497 is a prime.

It is not a weakly prime, because it can be changed into another prime (86855437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43427748 + 43427749.

It is an arithmetic number, because the mean of its divisors is an integer number (43427749).

Almost surely, 2^86855497 is an apocalyptic number.

It is an amenable number.

86855497 is a deficient number, since it is larger than the sum of its proper divisors (1).

86855497 is an equidigital number, since it uses as much as digits as its factorization.

86855497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 52.

The square root of 86855497 is about 9319.6296600241. The cubic root of 86855497 is about 442.8593006733.

It can be divided in two parts, 868 and 55497, that added together give a palindrome (56365).

The spelling of 86855497 in words is "eighty-six million, eight hundred fifty-five thousand, four hundred ninety-seven".