618454979 has 2 divisors, whose sum is σ = 618454980. Its totient is φ = 618454978.

The previous prime is 618454973. The next prime is 618454987. The reversal of 618454979 is 979454816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618454979 - 2⁸ = 618454723 is a prime.

It is a super-2 number, since 2×618454979² = 764973122099780882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 618454979.

It is not a weakly prime, because it can be changed into another prime (618454973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309227489 + 309227490.

It is an arithmetic number, because the mean of its divisors is an integer number (309227490).

Almost surely, 2^618454979 is an apocalyptic number.

618454979 is a deficient number, since it is larger than the sum of its proper divisors (1).

618454979 is an equidigital number, since it uses as much as digits as its factorization.

618454979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 618454979 is about 24868.7550753953. The cubic root of 618454979 is about 851.9930068232.

The spelling of 618454979 in words is "six hundred eighteen million, four hundred fifty-four thousand, nine hundred seventy-nine".