57000191 has 2 divisors, whose sum is σ = 57000192. Its totient is φ = 57000190.

The previous prime is 57000179. The next prime is 57000193. The reversal of 57000191 is 19100075.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57000191 - 2¹⁰ = 56999167 is a prime.

Together with 57000193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57000193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28500095 + 28500096.

It is an arithmetic number, because the mean of its divisors is an integer number (28500096).

Almost surely, 2^57000191 is an apocalyptic number.

57000191 is a deficient number, since it is larger than the sum of its proper divisors (1).

57000191 is an equidigital number, since it uses as much as digits as its factorization.

57000191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315, while the sum is 23.

The square root of 57000191 is about 7549.8470845442. The cubic root of 57000191 is about 384.8505429890.

The spelling of 57000191 in words is "fifty-seven million, one hundred ninety-one", and thus it is an aban number.