618939329 has 2 divisors, whose sum is σ = 618939330. Its totient is φ = 618939328.

The previous prime is 618939319. The next prime is 618939341. The reversal of 618939329 is 923939816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606144400 + 12794929 = 24620^2 + 3577^2 .

It is a cyclic number.

It is not a de Polignac number, because 618939329 - 2⁸ = 618939073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (618939319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309469664 + 309469665.

It is an arithmetic number, because the mean of its divisors is an integer number (309469665).

Almost surely, 2^618939329 is an apocalyptic number.

It is an amenable number.

618939329 is a deficient number, since it is larger than the sum of its proper divisors (1).

618939329 is an equidigital number, since it uses as much as digits as its factorization.

618939329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 50.

The square root of 618939329 is about 24878.4912926809. The cubic root of 618939329 is about 852.2153647671.

The spelling of 618939329 in words is "six hundred eighteen million, nine hundred thirty-nine thousand, three hundred twenty-nine".