57067891 has 2 divisors, whose sum is σ = 57067892. Its totient is φ = 57067890.

The previous prime is 57067889. The next prime is 57067919. The reversal of 57067891 is 19876075.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57067891 - 2¹ = 57067889 is a prime.

Together with 57067889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57067841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28533945 + 28533946.

It is an arithmetic number, because the mean of its divisors is an integer number (28533946).

Almost surely, 2^57067891 is an apocalyptic number.

57067891 is a deficient number, since it is larger than the sum of its proper divisors (1).

57067891 is an equidigital number, since it uses as much as digits as its factorization.

57067891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 57067891 is about 7554.3292885603. The cubic root of 57067891 is about 385.0028470021.

The spelling of 57067891 in words is "fifty-seven million, sixty-seven thousand, eight hundred ninety-one".