87399051 has 4 divisors (see below), whose sum is σ = 116532072. Its totient is φ = 58266032.

The previous prime is 87399049. The next prime is 87399071. The reversal of 87399051 is 15099378.

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 87399051 - 2¹ = 87399049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87398994 and 87399012.

It is not an unprimeable number, because it can be changed into a prime (87399071) 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, 14566506 + ... + 14566511.

It is an arithmetic number, because the mean of its divisors is an integer number (29133018).

Almost surely, 2^87399051 is an apocalyptic number.

87399051 is a deficient number, since it is larger than the sum of its proper divisors (29133021).

87399051 is a wasteful number, since it uses less digits than its factorization.

87399051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29133020.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 87399051 is about 9348.7459586834. The cubic root of 87399051 is about 443.7812056082.

The spelling of 87399051 in words is "eighty-seven million, three hundred ninety-nine thousand, fifty-one".