57109405 has 8 divisors (see below), whose sum is σ = 68603832. Its totient is φ = 45639168.

The previous prime is 57109387. The next prime is 57109427. The reversal of 57109405 is 50490175.

It can be written as a sum of positive squares in 4 ways, for example, as 10896601 + 46212804 = 3301^2 + 6798^2 .

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 57109405 - 2⁵ = 57109373 is a prime.

It is a super-2 number, since 2×57109405² = 6522968278908050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 364 + ... + 10693.

It is an arithmetic number, because the mean of its divisors is an integer number (8575479).

Almost surely, 2^57109405 is an apocalyptic number.

It is an amenable number.

57109405 is a deficient number, since it is larger than the sum of its proper divisors (11494427).

57109405 is a wasteful number, since it uses less digits than its factorization.

57109405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12095.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 57109405 is about 7557.0764849907. The cubic root of 57109405 is about 385.0961810636.

The spelling of 57109405 in words is "fifty-seven million, one hundred nine thousand, four hundred five".