618790399 has 2 divisors, whose sum is σ = 618790400. Its totient is φ = 618790398.

The previous prime is 618790397. The next prime is 618790427. The reversal of 618790399 is 993097816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618790399 - 2¹ = 618790397 is a prime.

Together with 618790397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618790397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309395199 + 309395200.

It is an arithmetic number, because the mean of its divisors is an integer number (309395200).

Almost surely, 2^618790399 is an apocalyptic number.

618790399 is a deficient number, since it is larger than the sum of its proper divisors (1).

618790399 is an equidigital number, since it uses as much as digits as its factorization.

618790399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 618790399 is about 24875.4979648649. The cubic root of 618790399 is about 852.1470055545.

The spelling of 618790399 in words is "six hundred eighteen million, seven hundred ninety thousand, three hundred ninety-nine".