87799877 has 4 divisors (see below), whose sum is σ = 95781696. Its totient is φ = 79818060.

The previous prime is 87799871. The next prime is 87799891. The reversal of 87799877 is 77899778.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87799877 - 2¹⁶ = 87734341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87799871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3990893 + ... + 3990914.

It is an arithmetic number, because the mean of its divisors is an integer number (23945424).

Almost surely, 2^87799877 is an apocalyptic number.

It is an amenable number.

87799877 is a deficient number, since it is larger than the sum of its proper divisors (7981819).

87799877 is a wasteful number, since it uses less digits than its factorization.

87799877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7981818.

The product of its digits is 12446784, while the sum is 62.

The square root of 87799877 is about 9370.1588567110. The cubic root of 87799877 is about 444.4585882837.

Subtracting from 87799877 its reverse (77899778), we obtain a palindrome (9900099).

The spelling of 87799877 in words is "eighty-seven million, seven hundred ninety-nine thousand, eight hundred seventy-seven".