87986399 has 4 divisors (see below), whose sum is σ = 88025136. Its totient is φ = 87947664.

The previous prime is 87986317. The next prime is 87986417. The reversal of 87986399 is 99368978.

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 87986399 - 2¹⁶ = 87920863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87986099) 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, 15734 + ... + 20579.

It is an arithmetic number, because the mean of its divisors is an integer number (22006284).

Almost surely, 2^87986399 is an apocalyptic number.

87986399 is a deficient number, since it is larger than the sum of its proper divisors (38737).

87986399 is a wasteful number, since it uses less digits than its factorization.

87986399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38736.

The product of its digits is 5878656, while the sum is 59.

The square root of 87986399 is about 9380.1065558980. The cubic root of 87986399 is about 444.7731015141.

It can be divided in two parts, 879 and 86399, that added together give a palindrome (87278).

The spelling of 87986399 in words is "eighty-seven million, nine hundred eighty-six thousand, three hundred ninety-nine".