618724913 has 2 divisors, whose sum is σ = 618724914. Its totient is φ = 618724912.

The previous prime is 618724907. The next prime is 618724927. The reversal of 618724913 is 319427816.

618724913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 614692849 + 4032064 = 24793^2 + 2008^2 .

It is a cyclic number.

It is not a de Polignac number, because 618724913 - 2¹⁴ = 618708529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (618724903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309362456 + 309362457.

It is an arithmetic number, because the mean of its divisors is an integer number (309362457).

Almost surely, 2^618724913 is an apocalyptic number.

It is an amenable number.

618724913 is a deficient number, since it is larger than the sum of its proper divisors (1).

618724913 is an equidigital number, since it uses as much as digits as its factorization.

618724913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 618724913 is about 24874.1816548806. The cubic root of 618724913 is about 852.1169438580.

The spelling of 618724913 in words is "six hundred eighteen million, seven hundred twenty-four thousand, nine hundred thirteen".