57339209 has 4 divisors (see below), whose sum is σ = 58311120. Its totient is φ = 56367300.

The previous prime is 57339179. The next prime is 57339211. The reversal of 57339209 is 90293375.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57339209 - 2²⁴ = 40561993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57339259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485867 + ... + 485984.

It is an arithmetic number, because the mean of its divisors is an integer number (14577780).

Almost surely, 2^57339209 is an apocalyptic number.

57339209 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

57339209 is a deficient number, since it is larger than the sum of its proper divisors (971911).

57339209 is an equidigital number, since it uses as much as digits as its factorization.

57339209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971910.

The product of its (nonzero) digits is 51030, while the sum is 38.

The square root of 57339209 is about 7572.2657771634. The cubic root of 57339209 is about 385.6120225794.

The spelling of 57339209 in words is "fifty-seven million, three hundred thirty-nine thousand, two hundred nine".