613849 has 2 divisors, whose sum is σ = 613850. Its totient is φ = 613848.

The previous prime is 613841. The next prime is 613861. The reversal of 613849 is 948316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 589824 + 24025 = 768^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 613849 - 2³ = 613841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 613849.

It is not a weakly prime, because it can be changed into another prime (613841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306924 + 306925.

It is an arithmetic number, because the mean of its divisors is an integer number (306925).

2⁶¹³⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

613849 is a deficient number, since it is larger than the sum of its proper divisors (1).

613849 is an equidigital number, since it uses as much as digits as its factorization.

613849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 613849 is about 783.4851625908. The cubic root of 613849 is about 84.9872645279.

The spelling of 613849 in words is "six hundred thirteen thousand, eight hundred forty-nine".