57698749 has 2 divisors, whose sum is σ = 57698750. Its totient is φ = 57698748.

The previous prime is 57698747. The next prime is 57698779. The reversal of 57698749 is 94789675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 13741849 = 6630^2 + 3707^2 .

It is a cyclic number.

It is not a de Polignac number, because 57698749 - 2¹ = 57698747 is a prime.

Together with 57698747, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 57698749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57698747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28849374 + 28849375.

It is an arithmetic number, because the mean of its divisors is an integer number (28849375).

Almost surely, 2^57698749 is an apocalyptic number.

It is an amenable number.

57698749 is a deficient number, since it is larger than the sum of its proper divisors (1).

57698749 is an equidigital number, since it uses as much as digits as its factorization.

57698749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 55.

The square root of 57698749 is about 7595.9692600747. The cubic root of 57698749 is about 386.4163248586.

The spelling of 57698749 in words is "fifty-seven million, six hundred ninety-eight thousand, seven hundred forty-nine".