11658987 has 12 divisors (see below), whose sum is σ = 16875664. Its totient is φ = 7756560.

The previous prime is 11658979. The next prime is 11659003. The reversal of 11658987 is 78985611.

It is not a de Polignac number, because 11658987 - 2³ = 11658979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11658187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4653 + ... + 6705.

Almost surely, 2^11658987 is an apocalyptic number.

11658987 is a deficient number, since it is larger than the sum of its proper divisors (5216677).

11658987 is a wasteful number, since it uses less digits than its factorization.

11658987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690 (or 2687 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 11658987 is about 3414.5258821687. The cubic root of 11658987 is about 226.7532946947.

The spelling of 11658987 in words is "eleven million, six hundred fifty-eight thousand, nine hundred eighty-seven".