57681893 has 2 divisors, whose sum is σ = 57681894. Its totient is φ = 57681892.

The previous prime is 57681889. The next prime is 57681919. The reversal of 57681893 is 39818675.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36457444 + 21224449 = 6038^2 + 4607^2 .

It is a cyclic number.

It is not a de Polignac number, because 57681893 - 2² = 57681889 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57681823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28840946 + 28840947.

It is an arithmetic number, because the mean of its divisors is an integer number (28840947).

Almost surely, 2^57681893 is an apocalyptic number.

It is an amenable number.

57681893 is a deficient number, since it is larger than the sum of its proper divisors (1).

57681893 is an equidigital number, since it uses as much as digits as its factorization.

57681893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 47.

The square root of 57681893 is about 7594.8596432061. The cubic root of 57681893 is about 386.3786922232.

The spelling of 57681893 in words is "fifty-seven million, six hundred eighty-one thousand, eight hundred ninety-three".