87855477 has 4 divisors (see below), whose sum is σ = 117140640. Its totient is φ = 58570316.

The previous prime is 87855421. The next prime is 87855479. The reversal of 87855477 is 77455878.

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 87855477 - 2⁷ = 87855349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87855479) 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, 14642577 + ... + 14642582.

It is an arithmetic number, because the mean of its divisors is an integer number (29285160).

Almost surely, 2^87855477 is an apocalyptic number.

It is an amenable number.

87855477 is a deficient number, since it is larger than the sum of its proper divisors (29285163).

87855477 is a wasteful number, since it uses less digits than its factorization.

87855477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29285162.

The product of its digits is 2195200, while the sum is 51.

The square root of 87855477 is about 9373.1252525505. The cubic root of 87855477 is about 444.5523875153.

The spelling of 87855477 in words is "eighty-seven million, eight hundred fifty-five thousand, four hundred seventy-seven".