57208649 has 2 divisors, whose sum is σ = 57208650. Its totient is φ = 57208648.

The previous prime is 57208637. The next prime is 57208651. The reversal of 57208649 is 94680275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55234624 + 1974025 = 7432^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 57208649 - 2¹⁶ = 57143113 is a prime.

Together with 57208651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57207649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28604324 + 28604325.

It is an arithmetic number, because the mean of its divisors is an integer number (28604325).

Almost surely, 2^57208649 is an apocalyptic number.

It is an amenable number.

57208649 is a deficient number, since it is larger than the sum of its proper divisors (1).

57208649 is an equidigital number, since it uses as much as digits as its factorization.

57208649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 57208649 is about 7563.6399306154. The cubic root of 57208649 is about 385.3191237249.

The spelling of 57208649 in words is "fifty-seven million, two hundred eight thousand, six hundred forty-nine".