57685949 has 2 divisors, whose sum is σ = 57685950. Its totient is φ = 57685948.

The previous prime is 57685939. The next prime is 57685951. The reversal of 57685949 is 94958675.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34597924 + 23088025 = 5882^2 + 4805^2 .

It is a cyclic number.

It is not a de Polignac number, because 57685949 - 2⁴ = 57685933 is a prime.

Together with 57685951, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57685949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57685939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28842974 + 28842975.

It is an arithmetic number, because the mean of its divisors is an integer number (28842975).

Almost surely, 2^57685949 is an apocalyptic number.

It is an amenable number.

57685949 is a deficient number, since it is larger than the sum of its proper divisors (1).

57685949 is an equidigital number, since it uses as much as digits as its factorization.

57685949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 53.

The square root of 57685949 is about 7595.1266612217. The cubic root of 57685949 is about 386.3877483016.

It can be divided in two parts, 57 and 685949, that multiplied together give a palindrome (39099093).

The spelling of 57685949 in words is "fifty-seven million, six hundred eighty-five thousand, nine hundred forty-nine".