87615629 has 4 divisors (see below), whose sum is σ = 87998460. Its totient is φ = 87232800.

The previous prime is 87615623. The next prime is 87615643. The reversal of 87615629 is 92651678.

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 40322500 + 47293129 = 6350^2 + 6877^2 .

It is a cyclic number.

It is not a de Polignac number, because 87615629 - 2¹⁶ = 87550093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87615629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87615623) 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 3 ways as a sum of consecutive naturals, for example, 191072 + ... + 191529.

It is an arithmetic number, because the mean of its divisors is an integer number (21999615).

Almost surely, 2^87615629 is an apocalyptic number.

It is an amenable number.

87615629 is a deficient number, since it is larger than the sum of its proper divisors (382831).

87615629 is a wasteful number, since it uses less digits than its factorization.

87615629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382830.

The product of its digits is 181440, while the sum is 44.

The square root of 87615629 is about 9360.3220564252. The cubic root of 87615629 is about 444.1474718444.

The spelling of 87615629 in words is "eighty-seven million, six hundred fifteen thousand, six hundred twenty-nine".