673426979 has 2 divisors, whose sum is σ = 673426980. Its totient is φ = 673426978.

The previous prime is 673426939. The next prime is 673426993. The reversal of 673426979 is 979624376.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 673426979 - 2¹⁶ = 673361443 is a 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 673426979.

It is not a weakly prime, because it can be changed into another prime (673426909) 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, 336713489 + 336713490.

It is an arithmetic number, because the mean of its divisors is an integer number (336713490).

Almost surely, 2^673426979 is an apocalyptic number.

673426979 is a deficient number, since it is larger than the sum of its proper divisors (1).

673426979 is an equidigital number, since it uses as much as digits as its factorization.

673426979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 53.

The square root of 673426979 is about 25950.4716527465. The cubic root of 673426979 is about 876.5233779282.

The spelling of 673426979 in words is "six hundred seventy-three million, four hundred twenty-six thousand, nine hundred seventy-nine".