57621713 has 4 divisors (see below), whose sum is σ = 57846180. Its totient is φ = 57397248.

The previous prime is 57621703. The next prime is 57621749. The reversal of 57621713 is 31712675.

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 41113744 + 16507969 = 6412^2 + 4063^2 .

It is a cyclic number.

It is not a de Polignac number, because 57621713 - 2⁶ = 57621649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57621713.

It is not an unprimeable number, because it can be changed into a prime (57621703) 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, 111848 + ... + 112361.

It is an arithmetic number, because the mean of its divisors is an integer number (14461545).

Almost surely, 2^57621713 is an apocalyptic number.

It is an amenable number.

57621713 is a deficient number, since it is larger than the sum of its proper divisors (224467).

57621713 is a wasteful number, since it uses less digits than its factorization.

57621713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224466.

The product of its digits is 8820, while the sum is 32.

The square root of 57621713 is about 7590.8967190972. The cubic root of 57621713 is about 386.2442747621.

The spelling of 57621713 in words is "fifty-seven million, six hundred twenty-one thousand, seven hundred thirteen".