57209843 has 4 divisors (see below), whose sum is σ = 58289328. Its totient is φ = 56130360.

The previous prime is 57209833. The next prime is 57209861. The reversal of 57209843 is 34890275.

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

It is a cyclic number.

It is not a de Polignac number, because 57209843 - 2⁸ = 57209587 is a prime.

It is a super-2 number, since 2×57209843² = 6545932272169298, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57209797 and 57209806.

It is not an unprimeable number, because it can be changed into a prime (57209813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539663 + ... + 539768.

It is an arithmetic number, because the mean of its divisors is an integer number (14572332).

Almost surely, 2^57209843 is an apocalyptic number.

57209843 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

57209843 is a deficient number, since it is larger than the sum of its proper divisors (1079485).

57209843 is a wasteful number, since it uses less digits than its factorization.

57209843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079484.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 57209843 is about 7563.7188604548. The cubic root of 57209843 is about 385.3218043675.

The spelling of 57209843 in words is "fifty-seven million, two hundred nine thousand, eight hundred forty-three".