57641813 has 2 divisors, whose sum is σ = 57641814. Its totient is φ = 57641812.

The previous prime is 57641789. The next prime is 57641827. The reversal of 57641813 is 31814675.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33895684 + 23746129 = 5822^2 + 4873^2 .

It is a cyclic number.

It is not a de Polignac number, because 57641813 - 2⁸ = 57641557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57641833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28820906 + 28820907.

It is an arithmetic number, because the mean of its divisors is an integer number (28820907).

Almost surely, 2^57641813 is an apocalyptic number.

It is an amenable number.

57641813 is a deficient number, since it is larger than the sum of its proper divisors (1).

57641813 is an equidigital number, since it uses as much as digits as its factorization.

57641813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 57641813 is about 7592.2205579132. The cubic root of 57641813 is about 386.2891803309.

The spelling of 57641813 in words is "fifty-seven million, six hundred forty-one thousand, eight hundred thirteen".