57209947 has 8 divisors (see below), whose sum is σ = 63209376. Its totient is φ = 51503232.

The previous prime is 57209923. The next prime is 57209959. The reversal of 57209947 is 74990275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57209947 - 2¹⁵ = 57177179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57209987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72768 + ... + 73549.

It is an arithmetic number, because the mean of its divisors is an integer number (7901172).

Almost surely, 2^57209947 is an apocalyptic number.

57209947 is a deficient number, since it is larger than the sum of its proper divisors (5999429).

57209947 is a wasteful number, since it uses less digits than its factorization.

57209947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146357.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 57209947 is about 7563.7257353767. The cubic root of 57209947 is about 385.3220378556.

The spelling of 57209947 in words is "fifty-seven million, two hundred nine thousand, nine hundred forty-seven".