87899379 has 4 divisors (see below), whose sum is σ = 117199176. Its totient is φ = 58599584.

The previous prime is 87899369. The next prime is 87899381. The reversal of 87899379 is 97399878.

It is a happy number.

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 87899379 - 2⁵ = 87899347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87899369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14649894 + ... + 14649899.

It is an arithmetic number, because the mean of its divisors is an integer number (29299794).

Almost surely, 2^87899379 is an apocalyptic number.

87899379 is a deficient number, since it is larger than the sum of its proper divisors (29299797).

87899379 is a wasteful number, since it uses less digits than its factorization.

87899379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29299796.

The product of its digits is 6858432, while the sum is 60.

The square root of 87899379 is about 9375.4668683751. The cubic root of 87899379 is about 444.6264238365.

The spelling of 87899379 in words is "eighty-seven million, eight hundred ninety-nine thousand, three hundred seventy-nine".