86642489 has 24 divisors (see below), whose sum is σ = 100204800. Its totient is φ = 74615040.

The previous prime is 86642447. The next prime is 86642497. The reversal of 86642489 is 98424668.

It is not a de Polignac number, because 86642489 - 2¹² = 86638393 is a prime.

Its product of digits (663552) is a multiple of the sum of its prime divisors (576).

It is not an unprimeable number, because it can be changed into a prime (86642429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169967 + ... + 170475.

It is an arithmetic number, because the mean of its divisors is an integer number (4175200).

Almost surely, 2^86642489 is an apocalyptic number.

It is an amenable number.

86642489 is a deficient number, since it is larger than the sum of its proper divisors (13562311).

86642489 is a wasteful number, since it uses less digits than its factorization.

86642489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 576 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 86642489 is about 9308.1947229310. The cubic root of 86642489 is about 442.4969755185.

The spelling of 86642489 in words is "eighty-six million, six hundred forty-two thousand, four hundred eighty-nine".