57399919 has 2 divisors, whose sum is σ = 57399920. Its totient is φ = 57399918.

The previous prime is 57399917. The next prime is 57399949. The reversal of 57399919 is 91999375.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57399919 - 2¹ = 57399917 is a prime.

It is a super-2 number, since 2×57399919² = 6589501402413122, which contains 22 as substring.

Together with 57399917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57399917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28699959 + 28699960.

It is an arithmetic number, because the mean of its divisors is an integer number (28699960).

Almost surely, 2^57399919 is an apocalyptic number.

57399919 is a deficient number, since it is larger than the sum of its proper divisors (1).

57399919 is an equidigital number, since it uses as much as digits as its factorization.

57399919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 688905, while the sum is 52.

The square root of 57399919 is about 7576.2734243162. The cubic root of 57399919 is about 385.7480682214.

The spelling of 57399919 in words is "fifty-seven million, three hundred ninety-nine thousand, nine hundred nineteen".