86872289 has 4 divisors (see below), whose sum is σ = 99282624. Its totient is φ = 74461956.

The previous prime is 86872283. The next prime is 86872297. The reversal of 86872289 is 98227868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86872289 - 2⁴ = 86872273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86872283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6205157 + ... + 6205170.

It is an arithmetic number, because the mean of its divisors is an integer number (24820656).

Almost surely, 2^86872289 is an apocalyptic number.

It is an amenable number.

86872289 is a deficient number, since it is larger than the sum of its proper divisors (12410335).

86872289 is a wasteful number, since it uses less digits than its factorization.

86872289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12410334.

The product of its digits is 774144, while the sum is 50.

The square root of 86872289 is about 9320.5305106523. The cubic root of 86872289 is about 442.8878385492.

The spelling of 86872289 in words is "eighty-six million, eight hundred seventy-two thousand, two hundred eighty-nine".