57361649 has 2 divisors, whose sum is σ = 57361650. Its totient is φ = 57361648.

The previous prime is 57361639. The next prime is 57361651. The reversal of 57361649 is 94616375.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57274624 + 87025 = 7568^2 + 295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57361649 is a prime.

Together with 57361651, 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 (57361639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28680824 + 28680825.

It is an arithmetic number, because the mean of its divisors is an integer number (28680825).

Almost surely, 2^57361649 is an apocalyptic number.

It is an amenable number.

57361649 is a deficient number, since it is larger than the sum of its proper divisors (1).

57361649 is an equidigital number, since it uses as much as digits as its factorization.

57361649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 41.

The square root of 57361649 is about 7573.7473551737. The cubic root of 57361649 is about 385.6623197808.

The spelling of 57361649 in words is "fifty-seven million, three hundred sixty-one thousand, six hundred forty-nine".