618913 has 2 divisors, whose sum is σ = 618914. Its totient is φ = 618912.

The previous prime is 618883. The next prime is 618929. The reversal of 618913 is 319816.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501264 + 117649 = 708^2 + 343^2 .

It is a cyclic number.

It is not a de Polignac number, because 618913 - 2¹³ = 610721 is a prime.

It is not a weakly prime, because it can be changed into another prime (618413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309456 + 309457.

It is an arithmetic number, because the mean of its divisors is an integer number (309457).

2⁶¹⁸⁹¹³ is an apocalyptic number.

It is an amenable number.

618913 is a deficient number, since it is larger than the sum of its proper divisors (1).

618913 is an equidigital number, since it uses as much as digits as its factorization.

618913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 618913 is about 786.7102389063. The cubic root of 618913 is about 85.2203280494.

The spelling of 618913 in words is "six hundred eighteen thousand, nine hundred thirteen".