55279669 has 2 divisors, whose sum is σ = 55279670. Its totient is φ = 55279668.

The previous prime is 55279643. The next prime is 55279673. The reversal of 55279669 is 96697255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31640625 + 23639044 = 5625^2 + 4862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55279669 is a prime.

It is a super-2 number, since 2×55279669² = 6111683609499122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55279619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27639834 + 27639835.

It is an arithmetic number, because the mean of its divisors is an integer number (27639835).

Almost surely, 2^55279669 is an apocalyptic number.

It is an amenable number.

55279669 is a deficient number, since it is larger than the sum of its proper divisors (1).

55279669 is an equidigital number, since it uses as much as digits as its factorization.

55279669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 49.

The square root of 55279669 is about 7435.0298587161. The cubic root of 55279669 is about 380.9387432144.

The spelling of 55279669 in words is "fifty-five million, two hundred seventy-nine thousand, six hundred sixty-nine".