618659959 has 2 divisors, whose sum is σ = 618659960. Its totient is φ = 618659958.

The previous prime is 618659933. The next prime is 618659989. The reversal of 618659959 is 959956816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618659959 - 2⁵ = 618659927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618659989) 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, 309329979 + 309329980.

It is an arithmetic number, because the mean of its divisors is an integer number (309329980).

Almost surely, 2^618659959 is an apocalyptic number.

618659959 is a deficient number, since it is larger than the sum of its proper divisors (1).

618659959 is an equidigital number, since it uses as much as digits as its factorization.

618659959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 58.

The square root of 618659959 is about 24872.8759696180. The cubic root of 618659959 is about 852.0871242835.

It can be divided in two parts, 61865 and 9959, that added together give a square (71824 = 268²).

The spelling of 618659959 in words is "six hundred eighteen million, six hundred fifty-nine thousand, nine hundred fifty-nine".