618979 has 2 divisors, whose sum is σ = 618980. Its totient is φ = 618978.

The previous prime is 618971. The next prime is 618991. The reversal of 618979 is 979816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618979 - 2³ = 618971 is a prime.

It is not a weakly prime, because it can be changed into another prime (618971) 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, 309489 + 309490.

It is an arithmetic number, because the mean of its divisors is an integer number (309490).

2⁶¹⁸⁹⁷⁹ is an apocalyptic number.

618979 is a deficient number, since it is larger than the sum of its proper divisors (1).

618979 is an equidigital number, since it uses as much as digits as its factorization.

618979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 618979 is about 786.7521846172. The cubic root of 618979 is about 85.2233571998.

The spelling of 618979 in words is "six hundred eighteen thousand, nine hundred seventy-nine".