87987157 has 4 divisors (see below), whose sum is σ = 92618080. Its totient is φ = 83356236.

The previous prime is 87987143. The next prime is 87987161. The reversal of 87987157 is 75178978.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87987157 - 2¹¹ = 87985109 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 (87987127) 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, 2315433 + ... + 2315470.

It is an arithmetic number, because the mean of its divisors is an integer number (23154520).

Almost surely, 2^87987157 is an apocalyptic number.

It is an amenable number.

87987157 is a deficient number, since it is larger than the sum of its proper divisors (4630923).

87987157 is a wasteful number, since it uses less digits than its factorization.

87987157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4630922.

The product of its digits is 987840, while the sum is 52.

The square root of 87987157 is about 9380.1469604692. The cubic root of 87987157 is about 444.7743787457.

The spelling of 87987157 in words is "eighty-seven million, nine hundred eighty-seven thousand, one hundred fifty-seven".