613812 has 12 divisors (see below), whose sum is σ = 1432256. Its totient is φ = 204600.

The previous prime is 613807. The next prime is 613813. The reversal of 613812 is 218316.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 613812.

It is not an unprimeable number, because it can be changed into a prime (613813) 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, 25564 + ... + 25587.

2⁶¹³⁸¹² is an apocalyptic number.

It is an amenable number.

613812 is an abundant number, since it is smaller than the sum of its proper divisors (818444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

613812 is a wasteful number, since it uses less digits than its factorization.

613812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51158 (or 51156 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 613812 is about 783.4615497904. The cubic root of 613812 is about 84.9855569462.

The spelling of 613812 in words is "six hundred thirteen thousand, eight hundred twelve".