55377769 has 2 divisors, whose sum is σ = 55377770. Its totient is φ = 55377768.

The previous prime is 55377737. The next prime is 55377779. The reversal of 55377769 is 96777355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54567769 + 810000 = 7387^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 55377769 - 2⁵ = 55377737 is a prime.

It is a super-2 number, since 2×55377769² = 6133394598834722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55377709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27688884 + 27688885.

It is an arithmetic number, because the mean of its divisors is an integer number (27688885).

Almost surely, 2^55377769 is an apocalyptic number.

It is an amenable number.

55377769 is a deficient number, since it is larger than the sum of its proper divisors (1).

55377769 is an equidigital number, since it uses as much as digits as its factorization.

55377769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1389150, while the sum is 49.

The square root of 55377769 is about 7441.6240834915. The cubic root of 55377769 is about 381.1639496200.

The spelling of 55377769 in words is "fifty-five million, three hundred seventy-seven thousand, seven hundred sixty-nine".