57740509 has 2 divisors, whose sum is σ = 57740510. Its totient is φ = 57740508.

The previous prime is 57740491. The next prime is 57740513. The reversal of 57740509 is 90504775.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45941284 + 11799225 = 6778^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 57740509 - 2¹⁹ = 57216221 is a prime.

It is equal to p_3435895 and since 57740509 and 3435895 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57740519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28870254 + 28870255.

It is an arithmetic number, because the mean of its divisors is an integer number (28870255).

Almost surely, 2^57740509 is an apocalyptic number.

It is an amenable number.

57740509 is a deficient number, since it is larger than the sum of its proper divisors (1).

57740509 is an equidigital number, since it uses as much as digits as its factorization.

57740509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 57740509 is about 7598.7175891725. The cubic root of 57740509 is about 386.5095264995.

The spelling of 57740509 in words is "fifty-seven million, seven hundred forty thousand, five hundred nine".