87900977 has 4 divisors (see below), whose sum is σ = 89559540. Its totient is φ = 86242416.

The previous prime is 87900949. The next prime is 87900997. The reversal of 87900977 is 77900978.

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 41783296 + 46117681 = 6464^2 + 6791^2 .

It is a cyclic number.

It is not a de Polignac number, because 87900977 - 2¹⁰ = 87899953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87900947) 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, 829202 + ... + 829307.

It is an arithmetic number, because the mean of its divisors is an integer number (22389885).

Almost surely, 2^87900977 is an apocalyptic number.

It is an amenable number.

87900977 is a deficient number, since it is larger than the sum of its proper divisors (1658563).

87900977 is a wasteful number, since it uses less digits than its factorization.

87900977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658562.

The product of its (nonzero) digits is 222264, while the sum is 47.

The square root of 87900977 is about 9375.5520904105. The cubic root of 87900977 is about 444.6291182382.

Subtracting from 87900977 its reverse (77900978), we obtain a palindrome (9999999).

The spelling of 87900977 in words is "eighty-seven million, nine hundred thousand, nine hundred seventy-seven".