57088861 has 2 divisors, whose sum is σ = 57088862. Its totient is φ = 57088860.

The previous prime is 57088819. The next prime is 57088919. The reversal of 57088861 is 16888075.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41925625 + 15163236 = 6475^2 + 3894^2 .

It is a cyclic number.

It is not a de Polignac number, because 57088861 - 2⁹ = 57088349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57088061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28544430 + 28544431.

It is an arithmetic number, because the mean of its divisors is an integer number (28544431).

Almost surely, 2^57088861 is an apocalyptic number.

It is an amenable number.

57088861 is a deficient number, since it is larger than the sum of its proper divisors (1).

57088861 is an equidigital number, since it uses as much as digits as its factorization.

57088861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 57088861 is about 7555.7171069330. The cubic root of 57088861 is about 385.0499985665.

The spelling of 57088861 in words is "fifty-seven million, eighty-eight thousand, eight hundred sixty-one".