55870687 has 4 divisors (see below), whose sum is σ = 59157216. Its totient is φ = 52584160.

The previous prime is 55870669. The next prime is 55870753. The reversal of 55870687 is 78607855.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55870687 - 2¹¹ = 55868639 is a prime.

It is a super-3 number, since 3×55870687³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55877687) 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, 1643239 + ... + 1643272.

It is an arithmetic number, because the mean of its divisors is an integer number (14789304).

Almost surely, 2^55870687 is an apocalyptic number.

55870687 is a deficient number, since it is larger than the sum of its proper divisors (3286529).

55870687 is a wasteful number, since it uses less digits than its factorization.

55870687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3286528.

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 55870687 is about 7474.6696916988. The cubic root of 55870687 is about 382.2915252236.

The spelling of 55870687 in words is "fifty-five million, eight hundred seventy thousand, six hundred eighty-seven".