87634157 has 4 divisors (see below), whose sum is σ = 94375260. Its totient is φ = 80893056.

The previous prime is 87634123. The next prime is 87634193. The reversal of 87634157 is 75143678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46430596 + 41203561 = 6814^2 + 6419^2 .

It is a cyclic number.

It is not a de Polignac number, because 87634157 - 2⁸ = 87633901 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 (87634457) 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, 3370532 + ... + 3370557.

It is an arithmetic number, because the mean of its divisors is an integer number (23593815).

Almost surely, 2^87634157 is an apocalyptic number.

It is an amenable number.

87634157 is a deficient number, since it is larger than the sum of its proper divisors (6741103).

87634157 is a wasteful number, since it uses less digits than its factorization.

87634157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741102.

The product of its digits is 141120, while the sum is 41.

The square root of 87634157 is about 9361.3117136436. The cubic root of 87634157 is about 444.1787774628.

The spelling of 87634157 in words is "eighty-seven million, six hundred thirty-four thousand, one hundred fifty-seven".