55290769 has 2 divisors, whose sum is σ = 55290770. Its totient is φ = 55290768.

The previous prime is 55290751. The next prime is 55290793. The reversal of 55290769 is 96709255.

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., 53100369 + 2190400 = 7287^2 + 1480^2 .

It is a cyclic number.

It is not a de Polignac number, because 55290769 - 2¹¹ = 55288721 is a prime.

It is a super-2 number, since 2×55290769² = 6114138273222722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55290799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27645384 + 27645385.

It is an arithmetic number, because the mean of its divisors is an integer number (27645385).

Almost surely, 2^55290769 is an apocalyptic number.

It is an amenable number.

55290769 is a deficient number, since it is larger than the sum of its proper divisors (1).

55290769 is an equidigital number, since it uses as much as digits as its factorization.

55290769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 55290769 is about 7435.7762876515. The cubic root of 55290769 is about 380.9642386460.

The spelling of 55290769 in words is "fifty-five million, two hundred ninety thousand, seven hundred sixty-nine".