57001649 has 2 divisors, whose sum is σ = 57001650. Its totient is φ = 57001648.

The previous prime is 57001639. The next prime is 57001667. The reversal of 57001649 is 94610075.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32001649 + 25000000 = 5657^2 + 5000^2 .

It is a cyclic number.

It is not a de Polignac number, because 57001649 - 2¹² = 56997553 is a prime.

It is not a weakly prime, because it can be changed into another prime (57001619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28500824 + 28500825.

It is an arithmetic number, because the mean of its divisors is an integer number (28500825).

Almost surely, 2^57001649 is an apocalyptic number.

It is an amenable number.

57001649 is a deficient number, since it is larger than the sum of its proper divisors (1).

57001649 is an equidigital number, since it uses as much as digits as its factorization.

57001649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 57001649 is about 7549.9436421738. The cubic root of 57001649 is about 384.8538243073.

The spelling of 57001649 in words is "fifty-seven million, one thousand, six hundred forty-nine".