613979 has 4 divisors (see below), whose sum is σ = 620160. Its totient is φ = 607800.

The previous prime is 613969. The next prime is 613981. The reversal of 613979 is 979316.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (613969) 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, 2939 + ... + 3140.

It is an arithmetic number, because the mean of its divisors is an integer number (155040).

2⁶¹³⁹⁷⁹ is an apocalyptic number.

613979 is a deficient number, since it is larger than the sum of its proper divisors (6181).

613979 is a wasteful number, since it uses less digits than its factorization.

613979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6180.

The product of its digits is 10206, while the sum is 35.

The square root of 613979 is about 783.5681208421. The cubic root of 613979 is about 84.9932635953.

The spelling of 613979 in words is "six hundred thirteen thousand, nine hundred seventy-nine".