57775891 has 2 divisors, whose sum is σ = 57775892. Its totient is φ = 57775890.

The previous prime is 57775889. The next prime is 57775943. The reversal of 57775891 is 19857775.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57775891 - 2¹ = 57775889 is a prime.

Together with 57775889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57775841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28887945 + 28887946.

It is an arithmetic number, because the mean of its divisors is an integer number (28887946).

Almost surely, 2^57775891 is an apocalyptic number.

57775891 is a deficient number, since it is larger than the sum of its proper divisors (1).

57775891 is an equidigital number, since it uses as much as digits as its factorization.

57775891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 617400, while the sum is 49.

The square root of 57775891 is about 7601.0453886291. The cubic root of 57775891 is about 386.5884583038.

The spelling of 57775891 in words is "fifty-seven million, seven hundred seventy-five thousand, eight hundred ninety-one".