57172609 has 4 divisors (see below), whose sum is σ = 61570516. Its totient is φ = 52774704.

The previous prime is 57172607. The next prime is 57172613. The reversal of 57172609 is 90627175.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39025009 + 18147600 = 6247^2 + 4260^2 .

It is a cyclic number.

It is not a de Polignac number, because 57172609 - 2¹ = 57172607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57172607) 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, 2198934 + ... + 2198959.

It is an arithmetic number, because the mean of its divisors is an integer number (15392629).

Almost surely, 2^57172609 is an apocalyptic number.

It is an amenable number.

57172609 is a deficient number, since it is larger than the sum of its proper divisors (4397907).

57172609 is a wasteful number, since it uses less digits than its factorization.

57172609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4397906.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 57172609 is about 7561.2571044767. The cubic root of 57172609 is about 385.2381929646.

The spelling of 57172609 in words is "fifty-seven million, one hundred seventy-two thousand, six hundred nine".