57858991 has 2 divisors, whose sum is σ = 57858992. Its totient is φ = 57858990.

The previous prime is 57858937. The next prime is 57859027. The reversal of 57858991 is 19985875.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57858991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57858391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28929495 + 28929496.

It is an arithmetic number, because the mean of its divisors is an integer number (28929496).

Almost surely, 2^57858991 is an apocalyptic number.

57858991 is a deficient number, since it is larger than the sum of its proper divisors (1).

57858991 is an equidigital number, since it uses as much as digits as its factorization.

57858991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 52.

The square root of 57858991 is about 7606.5097778153. The cubic root of 57858991 is about 386.7737149937.

The spelling of 57858991 in words is "fifty-seven million, eight hundred fifty-eight thousand, nine hundred ninety-one".