613913 has 4 divisors (see below), whose sum is σ = 620340. Its totient is φ = 607488.

The previous prime is 613903. The next prime is 613957. The reversal of 613913 is 319316.

613913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 375769 + 238144 = 613^2 + 488^2 .

It is a cyclic number.

It is not a de Polignac number, because 613913 - 2⁶ = 613849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613903) 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, 3068 + ... + 3261.

It is an arithmetic number, because the mean of its divisors is an integer number (155085).

2⁶¹³⁹¹³ is an apocalyptic number.

It is an amenable number.

613913 is a deficient number, since it is larger than the sum of its proper divisors (6427).

613913 is an equidigital number, since it uses as much as digits as its factorization.

613913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6426.

The product of its digits is 486, while the sum is 23.

The square root of 613913 is about 783.5260046737. The cubic root of 613913 is about 84.9902180208.

The spelling of 613913 in words is "six hundred thirteen thousand, nine hundred thirteen".