87634129 has 12 divisors (see below), whose sum is σ = 98571088. Its totient is φ = 77810040.

The previous prime is 87634123. The next prime is 87634193. The reversal of 87634129 is 92143678.

It is not a de Polignac number, because 87634129 - 2³ = 87634121 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 87634091 and 87634100.

It is not an unprimeable number, because it can be changed into a prime (87634121) 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, 3219 + ... + 13624.

Almost surely, 2^87634129 is an apocalyptic number.

It is an amenable number.

87634129 is a deficient number, since it is larger than the sum of its proper divisors (10936959).

87634129 is a wasteful number, since it uses less digits than its factorization.

87634129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16908 (or 16897 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 87634129 is about 9361.3102181265. The cubic root of 87634129 is about 444.1787301563.

The spelling of 87634129 in words is "eighty-seven million, six hundred thirty-four thousand, one hundred twenty-nine".