57539945 has 4 divisors (see below), whose sum is σ = 69047940. Its totient is φ = 46031952.

The previous prime is 57539899. The next prime is 57539947. The reversal of 57539945 is 54993575.

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 9320809 + 48219136 = 3053^2 + 6944^2 .

It is a cyclic number.

It is not a de Polignac number, because 57539945 - 2²² = 53345641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57539945.

It is not an unprimeable number, because it can be changed into a prime (57539947) 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, 5753990 + ... + 5753999.

It is an arithmetic number, because the mean of its divisors is an integer number (17261985).

Almost surely, 2^57539945 is an apocalyptic number.

It is an amenable number.

57539945 is a deficient number, since it is larger than the sum of its proper divisors (11507995).

57539945 is a wasteful number, since it uses less digits than its factorization.

57539945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11507994.

The product of its digits is 850500, while the sum is 47.

The square root of 57539945 is about 7585.5088820724. The cubic root of 57539945 is about 386.0614884998.

The spelling of 57539945 in words is "fifty-seven million, five hundred thirty-nine thousand, nine hundred forty-five".