57991061 has 2 divisors, whose sum is σ = 57991062. Its totient is φ = 57991060.

The previous prime is 57991057. The next prime is 57991067. The reversal of 57991061 is 16019975.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57912100 + 78961 = 7610^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 57991061 - 2² = 57991057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57991067) 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, 28995530 + 28995531.

It is an arithmetic number, because the mean of its divisors is an integer number (28995531).

Almost surely, 2^57991061 is an apocalyptic number.

It is an amenable number.

57991061 is a deficient number, since it is larger than the sum of its proper divisors (1).

57991061 is an equidigital number, since it uses as much as digits as its factorization.

57991061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 57991061 is about 7615.1862091481. The cubic root of 57991061 is about 387.0677769685.

The spelling of 57991061 in words is "fifty-seven million, nine hundred ninety-one thousand, sixty-one".