55727657 has 2 divisors, whose sum is σ = 55727658. Its totient is φ = 55727656.

The previous prime is 55727653. The next prime is 55727663. The reversal of 55727657 is 75672755.

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., 31629376 + 24098281 = 5624^2 + 4909^2 .

It is a cyclic number.

It is not a de Polignac number, because 55727657 - 2² = 55727653 is a prime.

It is not a weakly prime, because it can be changed into another prime (55727653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27863828 + 27863829.

It is an arithmetic number, because the mean of its divisors is an integer number (27863829).

Almost surely, 2^55727657 is an apocalyptic number.

It is an amenable number.

55727657 is a deficient number, since it is larger than the sum of its proper divisors (1).

55727657 is an equidigital number, since it uses as much as digits as its factorization.

55727657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 514500, while the sum is 44.

The square root of 55727657 is about 7465.0959136504. The cubic root of 55727657 is about 381.9650219702.

The spelling of 55727657 in words is "fifty-five million, seven hundred twenty-seven thousand, six hundred fifty-seven".