613709 has 4 divisors (see below), whose sum is σ = 640416. Its totient is φ = 587004.

The previous prime is 613699. The next prime is 613733. The reversal of 613709 is 907316.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 613709 - 2¹² = 609613 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 (613759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13319 + ... + 13364.

It is an arithmetic number, because the mean of its divisors is an integer number (160104).

2⁶¹³⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

613709 is a deficient number, since it is larger than the sum of its proper divisors (26707).

613709 is a wasteful number, since it uses less digits than its factorization.

613709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26706.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 613709 is about 783.3958131111. The cubic root of 613709 is about 84.9808030465.

The spelling of 613709 in words is "six hundred thirteen thousand, seven hundred nine".