87617885 has 8 divisors (see below), whose sum is σ = 106582200. Its totient is φ = 69133824.

The previous prime is 87617857. The next prime is 87617897. The reversal of 87617885 is 58871678.

It can be written as a sum of positive squares in 4 ways, for example, as 16434916 + 71182969 = 4054^2 + 8437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87617885 - 2⁶ = 87617821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119660 + ... + 120389.

It is an arithmetic number, because the mean of its divisors is an integer number (13322775).

Almost surely, 2^87617885 is an apocalyptic number.

It is an amenable number.

87617885 is a deficient number, since it is larger than the sum of its proper divisors (18964315).

87617885 is a wasteful number, since it uses less digits than its factorization.

87617885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240127.

The product of its digits is 752640, while the sum is 50.

The square root of 87617885 is about 9360.4425643235. The cubic root of 87617885 is about 444.1512839043.

The spelling of 87617885 in words is "eighty-seven million, six hundred seventeen thousand, eight hundred eighty-five".