86647493 has 2 divisors, whose sum is σ = 86647494. Its totient is φ = 86647492.

The previous prime is 86647471. The next prime is 86647501. The reversal of 86647493 is 39474668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84235684 + 2411809 = 9178^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 86647493 - 2⁸ = 86647237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86647403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43323746 + 43323747.

It is an arithmetic number, because the mean of its divisors is an integer number (43323747).

Almost surely, 2^86647493 is an apocalyptic number.

It is an amenable number.

86647493 is a deficient number, since it is larger than the sum of its proper divisors (1).

86647493 is an equidigital number, since it uses as much as digits as its factorization.

86647493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 47.

The square root of 86647493 is about 9308.4635144582. The cubic root of 86647493 is about 442.5054940959.

The spelling of 86647493 in words is "eighty-six million, six hundred forty-seven thousand, four hundred ninety-three".