86989399 has 4 divisors (see below), whose sum is σ = 99416464. Its totient is φ = 74562336.

The previous prime is 86989393. The next prime is 86989403. The reversal of 86989399 is 99398968.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86989399 - 2⁵ = 86989367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86989393) 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, 6213522 + ... + 6213535.

It is an arithmetic number, because the mean of its divisors is an integer number (24854116).

Almost surely, 2^86989399 is an apocalyptic number.

86989399 is a deficient number, since it is larger than the sum of its proper divisors (12427065).

86989399 is a wasteful number, since it uses less digits than its factorization.

86989399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12427064.

The product of its digits is 7558272, while the sum is 61.

The square root of 86989399 is about 9326.8107625276. The cubic root of 86989399 is about 443.0867639150.

The spelling of 86989399 in words is "eighty-six million, nine hundred eighty-nine thousand, three hundred ninety-nine".