613999 has 2 divisors, whose sum is σ = 614000. Its totient is φ = 613998.

The previous prime is 613993. The next prime is 614041. The reversal of 613999 is 999316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 613999 - 2⁵ = 613967 is a prime.

It is a Chen prime.

613999 is a modest number, since divided by 999 gives 613 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306999 + 307000.

It is an arithmetic number, because the mean of its divisors is an integer number (307000).

2⁶¹³⁹⁹⁹ is an apocalyptic number.

613999 is a deficient number, since it is larger than the sum of its proper divisors (1).

613999 is an equidigital number, since it uses as much as digits as its factorization.

613999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 37.

The square root of 613999 is about 783.5808828704. The cubic root of 613999 is about 84.9941864536.

The spelling of 613999 in words is "six hundred thirteen thousand, nine hundred ninety-nine".