55869689 has 4 divisors (see below), whose sum is σ = 57796260. Its totient is φ = 53943120.

The previous prime is 55869677. The next prime is 55869721. The reversal of 55869689 is 98696855.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25806400 + 30063289 = 5080^2 + 5483^2 .

It is a cyclic number.

It is not a de Polignac number, because 55869689 - 2⁴ = 55869673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55869629) 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, 963242 + ... + 963299.

It is an arithmetic number, because the mean of its divisors is an integer number (14449065).

Almost surely, 2^55869689 is an apocalyptic number.

It is an amenable number.

55869689 is a deficient number, since it is larger than the sum of its proper divisors (1926571).

55869689 is a wasteful number, since it uses less digits than its factorization.

55869689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926570.

The product of its digits is 4665600, while the sum is 56.

The square root of 55869689 is about 7474.6029325978. The cubic root of 55869689 is about 382.2892489601.

The spelling of 55869689 in words is "fifty-five million, eight hundred sixty-nine thousand, six hundred eighty-nine".