618898439 has 2 divisors, whose sum is σ = 618898440. Its totient is φ = 618898438.

The previous prime is 618898433. The next prime is 618898487. The reversal of 618898439 is 934898816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618898439 - 2²⁰ = 617849863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618898433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309449219 + 309449220.

It is an arithmetic number, because the mean of its divisors is an integer number (309449220).

Almost surely, 2^618898439 is an apocalyptic number.

618898439 is a deficient number, since it is larger than the sum of its proper divisors (1).

618898439 is an equidigital number, since it uses as much as digits as its factorization.

618898439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 56.

The square root of 618898439 is about 24877.6694849015. The cubic root of 618898439 is about 852.1965972552.

The spelling of 618898439 in words is "six hundred eighteen million, eight hundred ninety-eight thousand, four hundred thirty-nine".