613990 has 16 divisors (see below), whose sum is σ = 1190448. Its totient is φ = 226656.

The previous prime is 613981. The next prime is 613993. The reversal of 613990 is 99316.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613993) 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 7 ways as a sum of consecutive naturals, for example, 2232 + ... + 2491.

It is an arithmetic number, because the mean of its divisors is an integer number (74403).

2⁶¹³⁹⁹⁰ is an apocalyptic number.

613990 is a deficient number, since it is larger than the sum of its proper divisors (576458).

613990 is a wasteful number, since it uses less digits than its factorization.

613990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 613990 is about 783.5751399834. The cubic root of 613990 is about 84.9937711699.

The spelling of 613990 in words is "six hundred thirteen thousand, nine hundred ninety".