87776587 has 8 divisors (see below), whose sum is σ = 89387856. Its totient is φ = 86176512.

The previous prime is 87776581. The next prime is 87776603. The reversal of 87776587 is 78567778.

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 87776587 - 2¹⁵ = 87743819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87776581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13923 + ... + 19219.

It is an arithmetic number, because the mean of its divisors is an integer number (11173482).

Almost surely, 2^87776587 is an apocalyptic number.

87776587 is a deficient number, since it is larger than the sum of its proper divisors (1611269).

87776587 is a wasteful number, since it uses less digits than its factorization.

87776587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597.

The product of its digits is 4609920, while the sum is 55.

The square root of 87776587 is about 9368.9159991965. The cubic root of 87776587 is about 444.4192854346.

The spelling of 87776587 in words is "eighty-seven million, seven hundred seventy-six thousand, five hundred eighty-seven".