55879669 has 2 divisors, whose sum is σ = 55879670. Its totient is φ = 55879668.

The previous prime is 55879651. The next prime is 55879699. The reversal of 55879669 is 96697855.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43362225 + 12517444 = 6585^2 + 3538^2 .

It is a cyclic number.

It is not a de Polignac number, because 55879669 - 2⁹ = 55879157 is a prime.

It is a super-2 number, since 2×55879669² = 6245074815099122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55879609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27939834 + 27939835.

It is an arithmetic number, because the mean of its divisors is an integer number (27939835).

Almost surely, 2^55879669 is an apocalyptic number.

It is an amenable number.

55879669 is a deficient number, since it is larger than the sum of its proper divisors (1).

55879669 is an equidigital number, since it uses as much as digits as its factorization.

55879669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 55.

The square root of 55879669 is about 7475.2704967780. The cubic root of 55879669 is about 382.3120103752.

The spelling of 55879669 in words is "fifty-five million, eight hundred seventy-nine thousand, six hundred sixty-nine".