86572989 has 16 divisors (see below), whose sum is σ = 133833600. Its totient is φ = 55205568.

The previous prime is 86572973. The next prime is 86572999. The reversal of 86572989 is 98927568.

It is a happy number.

It is not a de Polignac number, because 86572989 - 2⁴ = 86572973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86572909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69084 + ... + 70325.

It is an arithmetic number, because the mean of its divisors is an integer number (8364600).

Almost surely, 2^86572989 is an apocalyptic number.

It is an amenable number.

86572989 is a deficient number, since it is larger than the sum of its proper divisors (47260611).

86572989 is a wasteful number, since it uses less digits than its factorization.

86572989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139441 (or 139435 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 86572989 is about 9304.4607044148. The cubic root of 86572989 is about 442.3786280165.

The spelling of 86572989 in words is "eighty-six million, five hundred seventy-two thousand, nine hundred eighty-nine".