613965 has 24 divisors (see below), whose sum is σ = 1089504. Its totient is φ = 292800.

The previous prime is 613957. The next prime is 613967. The reversal of 613965 is 569316.

It is a happy number.

It is not a de Polignac number, because 613965 - 2³ = 613957 is a prime.

613965 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613967) 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 23 ways as a sum of consecutive naturals, for example, 10035 + ... + 10095.

It is an arithmetic number, because the mean of its divisors is an integer number (45396).

2⁶¹³⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

613965 is a deficient number, since it is larger than the sum of its proper divisors (475539).

613965 is a wasteful number, since it uses less digits than its factorization.

613965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 80 counting only the distinct ones).

The product of its digits is 4860, while the sum is 30.

The square root of 613965 is about 783.5591872986. The cubic root of 613965 is about 84.9926175826.

The spelling of 613965 in words is "six hundred thirteen thousand, nine hundred sixty-five".