57069913 has 2 divisors, whose sum is σ = 57069914. Its totient is φ = 57069912.

The previous prime is 57069911. The next prime is 57069917. The reversal of 57069913 is 31996075.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39538944 + 17530969 = 6288^2 + 4187^2 .

It is a cyclic number.

It is not a de Polignac number, because 57069913 - 2¹ = 57069911 is a prime.

Together with 57069911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57069911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28534956 + 28534957.

It is an arithmetic number, because the mean of its divisors is an integer number (28534957).

Almost surely, 2^57069913 is an apocalyptic number.

It is an amenable number.

57069913 is a deficient number, since it is larger than the sum of its proper divisors (1).

57069913 is an equidigital number, since it uses as much as digits as its factorization.

57069913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 57069913 is about 7554.4631179191. The cubic root of 57069913 is about 385.0073940223.

The spelling of 57069913 in words is "fifty-seven million, sixty-nine thousand, nine hundred thirteen".