57209799 has 4 divisors (see below), whose sum is σ = 76279736. Its totient is φ = 38139864.

The previous prime is 57209783. The next prime is 57209813. The reversal of 57209799 is 99790275.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 57209799 - 2⁴ = 57209783 is a prime.

It is a super-2 number, since 2×57209799² = 6545922203240802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57209729) 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, 9534964 + ... + 9534969.

It is an arithmetic number, because the mean of its divisors is an integer number (19069934).

Almost surely, 2^57209799 is an apocalyptic number.

57209799 is a deficient number, since it is larger than the sum of its proper divisors (19069937).

57209799 is a wasteful number, since it uses less digits than its factorization.

57209799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19069936.

The product of its (nonzero) digits is 357210, while the sum is 48.

The square root of 57209799 is about 7563.7159518321. The cubic root of 57209799 is about 385.3217055840.

The spelling of 57209799 in words is "fifty-seven million, two hundred nine thousand, seven hundred ninety-nine".