87555577 has 4 divisors (see below), whose sum is σ = 87904656. Its totient is φ = 87206500.

The previous prime is 87555569. The next prime is 87555581. The reversal of 87555577 is 77555578.

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 87555577 - 2³ = 87555569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87555577.

It is not an unprimeable number, because it can be changed into a prime (87555527) 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, 174163 + ... + 174664.

It is an arithmetic number, because the mean of its divisors is an integer number (21976164).

Almost surely, 2^87555577 is an apocalyptic number.

It is an amenable number.

87555577 is a deficient number, since it is larger than the sum of its proper divisors (349079).

87555577 is a wasteful number, since it uses less digits than its factorization.

87555577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349078.

The product of its digits is 1715000, while the sum is 49.

The square root of 87555577 is about 9357.1137109688. The cubic root of 87555577 is about 444.0459753409.

Subtracting from 87555577 its reverse (77555578), we obtain a palindrome (9999999).

The spelling of 87555577 in words is "eighty-seven million, five hundred fifty-five thousand, five hundred seventy-seven".