57263389 has 2 divisors, whose sum is σ = 57263390. Its totient is φ = 57263388.

The previous prime is 57263357. The next prime is 57263407. The reversal of 57263389 is 98336275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53538489 + 3724900 = 7317^2 + 1930^2 .

It is a cyclic number.

It is not a de Polignac number, because 57263389 - 2⁵ = 57263357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57263329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28631694 + 28631695.

It is an arithmetic number, because the mean of its divisors is an integer number (28631695).

Almost surely, 2^57263389 is an apocalyptic number.

It is an amenable number.

57263389 is a deficient number, since it is larger than the sum of its proper divisors (1).

57263389 is an equidigital number, since it uses as much as digits as its factorization.

57263389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 57263389 is about 7567.2576935109. The cubic root of 57263389 is about 385.4419818671.

The spelling of 57263389 in words is "fifty-seven million, two hundred sixty-three thousand, three hundred eighty-nine".