613903 has 2 divisors, whose sum is σ = 613904. Its totient is φ = 613902.

The previous prime is 613889. The next prime is 613957. The reversal of 613903 is 309316.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-613903 is a prime.

613903 is a lucky number.

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306951 + 306952.

It is an arithmetic number, because the mean of its divisors is an integer number (306952).

2⁶¹³⁹⁰³ is an apocalyptic number.

613903 is a deficient number, since it is larger than the sum of its proper divisors (1).

613903 is an equidigital number, since it uses as much as digits as its factorization.

613903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 613903 is about 783.5196232386. The cubic root of 613903 is about 84.9897565511.

The spelling of 613903 in words is "six hundred thirteen thousand, nine hundred three".