613391 has 4 divisors (see below), whose sum is σ = 617232. Its totient is φ = 609552.

The previous prime is 613381. The next prime is 613421. The reversal of 613391 is 193316.

613391 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613381) 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, 1670 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (154308).

2⁶¹³³⁹¹ is an apocalyptic number.

613391 is a deficient number, since it is larger than the sum of its proper divisors (3841).

613391 is a wasteful number, since it uses less digits than its factorization.

613391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840.

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

The square root of 613391 is about 783.1928242776. The cubic root of 613391 is about 84.9661226012.

The spelling of 613391 in words is "six hundred thirteen thousand, three hundred ninety-one".