57658649 has 2 divisors, whose sum is σ = 57658650. Its totient is φ = 57658648.

The previous prime is 57658637. The next prime is 57658697. The reversal of 57658649 is 94685675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55950400 + 1708249 = 7480^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 57658649 - 2⁴ = 57658633 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 57658597 and 57658606.

It is not a weakly prime, because it can be changed into another prime (57658619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28829324 + 28829325.

It is an arithmetic number, because the mean of its divisors is an integer number (28829325).

Almost surely, 2^57658649 is an apocalyptic number.

It is an amenable number.

57658649 is a deficient number, since it is larger than the sum of its proper divisors (1).

57658649 is an equidigital number, since it uses as much as digits as its factorization.

57658649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 50.

The square root of 57658649 is about 7593.3292434873. The cubic root of 57658649 is about 386.3267857382.

The spelling of 57658649 in words is "fifty-seven million, six hundred fifty-eight thousand, six hundred forty-nine".