57961613 has 4 divisors (see below), whose sum is σ = 57977340. Its totient is φ = 57945888.

The previous prime is 57961601. The next prime is 57961621. The reversal of 57961613 is 31616975.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 53042089 + 4919524 = 7283^2 + 2218^2 .

It is a cyclic number.

It is not a de Polignac number, because 57961613 - 2¹⁴ = 57945229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57961643) 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, 983 + ... + 10811.

It is an arithmetic number, because the mean of its divisors is an integer number (14494335).

Almost surely, 2^57961613 is an apocalyptic number.

It is an amenable number.

57961613 is a deficient number, since it is larger than the sum of its proper divisors (15727).

57961613 is an equidigital number, since it uses as much as digits as its factorization.

With its predecessor (57961612) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (15726).

57961613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15726.

The product of its digits is 34020, while the sum is 38.

The square root of 57961613 is about 7613.2524587065. The cubic root of 57961613 is about 387.0022478932.

The spelling of 57961613 in words is "fifty-seven million, nine hundred sixty-one thousand, six hundred thirteen".