86744491 has 2 divisors, whose sum is σ = 86744492. Its totient is φ = 86744490.

The previous prime is 86744467. The next prime is 86744527. The reversal of 86744491 is 19444768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86744491 - 2⁷ = 86744363 is a prime.

It is not a weakly prime, because it can be changed into another prime (86744461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43372245 + 43372246.

It is an arithmetic number, because the mean of its divisors is an integer number (43372246).

Almost surely, 2^86744491 is an apocalyptic number.

86744491 is a deficient number, since it is larger than the sum of its proper divisors (1).

86744491 is an equidigital number, since it uses as much as digits as its factorization.

86744491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 86744491 is about 9313.6722617880. The cubic root of 86744491 is about 442.6705542336.

The spelling of 86744491 in words is "eighty-six million, seven hundred forty-four thousand, four hundred ninety-one".