57661117 has 2 divisors, whose sum is σ = 57661118. Its totient is φ = 57661116.

The previous prime is 57661111. The next prime is 57661141. The reversal of 57661117 is 71116675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53085796 + 4575321 = 7286^2 + 2139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57661117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57661111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28830558 + 28830559.

It is an arithmetic number, because the mean of its divisors is an integer number (28830559).

Almost surely, 2^57661117 is an apocalyptic number.

It is an amenable number.

57661117 is a deficient number, since it is larger than the sum of its proper divisors (1).

57661117 is an equidigital number, since it uses as much as digits as its factorization.

57661117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 34.

The square root of 57661117 is about 7593.4917528104. The cubic root of 57661117 is about 386.3322977236.

The spelling of 57661117 in words is "fifty-seven million, six hundred sixty-one thousand, one hundred seventeen".