57997309 has 2 divisors, whose sum is σ = 57997310. Its totient is φ = 57997308.

The previous prime is 57997301. The next prime is 57997349. The reversal of 57997309 is 90379975.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53144100 + 4853209 = 7290^2 + 2203^2 .

It is a cyclic number.

It is not a de Polignac number, because 57997309 - 2³ = 57997301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57997301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28998654 + 28998655.

It is an arithmetic number, because the mean of its divisors is an integer number (28998655).

Almost surely, 2^57997309 is an apocalyptic number.

It is an amenable number.

57997309 is a deficient number, since it is larger than the sum of its proper divisors (1).

57997309 is an equidigital number, since it uses as much as digits as its factorization.

57997309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 535815, while the sum is 49.

The square root of 57997309 is about 7615.5964310092. The cubic root of 57997309 is about 387.0816774593.

The spelling of 57997309 in words is "fifty-seven million, nine hundred ninety-seven thousand, three hundred nine".