87977977 has 4 divisors (see below), whose sum is σ = 88017280. Its totient is φ = 87938676.

The previous prime is 87977951. The next prime is 87977983. The reversal of 87977977 is 77977978.

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 a de Polignac number, because none of the positive numbers 2^k-87977977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87977917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16077 + ... + 20842.

It is an arithmetic number, because the mean of its divisors is an integer number (22004320).

Almost surely, 2^87977977 is an apocalyptic number.

It is an amenable number.

87977977 is a deficient number, since it is larger than the sum of its proper divisors (39303).

87977977 is a wasteful number, since it uses less digits than its factorization.

87977977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39302.

The product of its digits is 10890936, while the sum is 61.

The square root of 87977977 is about 9379.6576163525. The cubic root of 87977977 is about 444.7589099321.

Subtracting from 87977977 its reverse (77977978), we obtain a palindrome (9999999).

The spelling of 87977977 in words is "eighty-seven million, nine hundred seventy-seven thousand, nine hundred seventy-seven".