87644659 has 2 divisors, whose sum is σ = 87644660. Its totient is φ = 87644658.

The previous prime is 87644653. The next prime is 87644681. The reversal of 87644659 is 95644678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87644659 - 2⁹ = 87644147 is a prime.

It is not a weakly prime, because it can be changed into another prime (87644653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43822329 + 43822330.

It is an arithmetic number, because the mean of its divisors is an integer number (43822330).

Almost surely, 2^87644659 is an apocalyptic number.

87644659 is a deficient number, since it is larger than the sum of its proper divisors (1).

87644659 is an equidigital number, since it uses as much as digits as its factorization.

87644659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 49.

The square root of 87644659 is about 9361.8726225045. The cubic root of 87644659 is about 444.1965200849.

The spelling of 87644659 in words is "eighty-seven million, six hundred forty-four thousand, six hundred fifty-nine".