55616969 has 4 divisors (see below), whose sum is σ = 55645200. Its totient is φ = 55588740.

The previous prime is 55616959. The next prime is 55616993. The reversal of 55616969 is 96961655.

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 55616969 - 2⁸ = 55616713 is a prime.

It is a super-2 number, since 2×55616969² = 6186494481493922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55616909) 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, 10919 + ... + 15180.

It is an arithmetic number, because the mean of its divisors is an integer number (13911300).

Almost surely, 2^55616969 is an apocalyptic number.

It is an amenable number.

55616969 is a deficient number, since it is larger than the sum of its proper divisors (28231).

55616969 is a wasteful number, since it uses less digits than its factorization.

55616969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28230.

The product of its digits is 437400, while the sum is 47.

The square root of 55616969 is about 7457.6785261903. The cubic root of 55616969 is about 381.7119640963.

The spelling of 55616969 in words is "fifty-five million, six hundred sixteen thousand, nine hundred sixty-nine".