57243493 has 2 divisors, whose sum is σ = 57243494. Its totient is φ = 57243492.

The previous prime is 57243457. The next prime is 57243497. The reversal of 57243493 is 39434275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32012964 + 25230529 = 5658^2 + 5023^2 .

It is a cyclic number.

It is not a de Polignac number, because 57243493 - 2⁹ = 57242981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57243497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28621746 + 28621747.

It is an arithmetic number, because the mean of its divisors is an integer number (28621747).

Almost surely, 2^57243493 is an apocalyptic number.

It is an amenable number.

57243493 is a deficient number, since it is larger than the sum of its proper divisors (1).

57243493 is an equidigital number, since it uses as much as digits as its factorization.

57243493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 57243493 is about 7565.9429683285. The cubic root of 57243493 is about 385.3973364596.

The spelling of 57243493 in words is "fifty-seven million, two hundred forty-three thousand, four hundred ninety-three".