87612157 has 4 divisors (see below), whose sum is σ = 88066300. Its totient is φ = 87158016.

The previous prime is 87612139. The next prime is 87612179. The reversal of 87612157 is 75121678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75121678 = 2 ⋅37560839.

It can be written as a sum of positive squares in 2 ways, for example, as 15888196 + 71723961 = 3986^2 + 8469^2 .

It is a cyclic number.

It is not a de Polignac number, because 87612157 - 2¹⁵ = 87579389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87612137) 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, 226782 + ... + 227167.

It is an arithmetic number, because the mean of its divisors is an integer number (22016575).

Almost surely, 2^87612157 is an apocalyptic number.

It is an amenable number.

87612157 is a deficient number, since it is larger than the sum of its proper divisors (454143).

87612157 is a wasteful number, since it uses less digits than its factorization.

87612157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454142.

The product of its digits is 23520, while the sum is 37.

The square root of 87612157 is about 9360.1365908837. The cubic root of 87612157 is about 444.1416049292.

The spelling of 87612157 in words is "eighty-seven million, six hundred twelve thousand, one hundred fifty-seven".