618299989 has 2 divisors, whose sum is σ = 618299990. Its totient is φ = 618299988.

The previous prime is 618299977. The next prime is 618300017. The reversal of 618299989 is 989992816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 559700964 + 58599025 = 23658^2 + 7655^2 .

It is a cyclic number.

It is not a de Polignac number, because 618299989 - 2⁷ = 618299861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618299789) 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, 309149994 + 309149995.

It is an arithmetic number, because the mean of its divisors is an integer number (309149995).

Almost surely, 2^618299989 is an apocalyptic number.

It is an amenable number.

618299989 is a deficient number, since it is larger than the sum of its proper divisors (1).

618299989 is an equidigital number, since it uses as much as digits as its factorization.

618299989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 61.

The square root of 618299989 is about 24865.6387209338. The cubic root of 618299989 is about 851.9218286814.

The spelling of 618299989 in words is "six hundred eighteen million, two hundred ninety-nine thousand, nine hundred eighty-nine".