87136131 has 8 divisors (see below), whose sum is σ = 117652480. Its totient is φ = 57355272.

The previous prime is 87136123. The next prime is 87136151. The reversal of 87136131 is 13163178.

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

It is not a de Polignac number, because 87136131 - 2³ = 87136123 is a prime.

It is a super-2 number, since 2×87136131² = 15185410651298322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87136151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183595 + ... + 184068.

It is an arithmetic number, because the mean of its divisors is an integer number (14706560).

Almost surely, 2^87136131 is an apocalyptic number.

87136131 is a deficient number, since it is larger than the sum of its proper divisors (30516349).

87136131 is a wasteful number, since it uses less digits than its factorization.

87136131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367745.

The product of its digits is 3024, while the sum is 30.

The square root of 87136131 is about 9334.6735882943. The cubic root of 87136131 is about 443.3357539707.

The spelling of 87136131 in words is "eighty-seven million, one hundred thirty-six thousand, one hundred thirty-one".