87990113 has 8 divisors (see below), whose sum is σ = 93330432. Its totient is φ = 82668096.

The previous prime is 87990101. The next prime is 87990137. The reversal of 87990113 is 31109978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87990113 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (87990143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6056 + ... + 14582.

It is an arithmetic number, because the mean of its divisors is an integer number (11666304).

Almost surely, 2^87990113 is an apocalyptic number.

It is an amenable number.

87990113 is a deficient number, since it is larger than the sum of its proper divisors (5340319).

87990113 is a wasteful number, since it uses less digits than its factorization.

87990113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9151.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 87990113 is about 9380.3045259736. The cubic root of 87990113 is about 444.7793595421.

The spelling of 87990113 in words is "eighty-seven million, nine hundred ninety thousand, one hundred thirteen".