57640901 has 2 divisors, whose sum is σ = 57640902. Its totient is φ = 57640900.

The previous prime is 57640871. The next prime is 57640949. The reversal of 57640901 is 10904675.

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., 57002500 + 638401 = 7550^2 + 799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57640901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57640201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28820450 + 28820451.

It is an arithmetic number, because the mean of its divisors is an integer number (28820451).

Almost surely, 2^57640901 is an apocalyptic number.

It is an amenable number.

57640901 is a deficient number, since it is larger than the sum of its proper divisors (1).

57640901 is an equidigital number, since it uses as much as digits as its factorization.

57640901 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 57640901 is about 7592.1604961961. The cubic root of 57640901 is about 386.2871430506.

The spelling of 57640901 in words is "fifty-seven million, six hundred forty thousand, nine hundred one".