673426939 has 2 divisors, whose sum is σ = 673426940. Its totient is φ = 673426938.

The previous prime is 673426909. The next prime is 673426979. The reversal of 673426939 is 939624376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 673426939 - 2¹¹ = 673424891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 673426892 and 673426901.

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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336713469 + 336713470.

It is an arithmetic number, because the mean of its divisors is an integer number (336713470).

Almost surely, 2^673426939 is an apocalyptic number.

673426939 is a deficient number, since it is larger than the sum of its proper divisors (1).

673426939 is an equidigital number, since it uses as much as digits as its factorization.

673426939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 49.

The square root of 673426939 is about 25950.4708820476. The cubic root of 673426939 is about 876.5233605737.

The spelling of 673426939 in words is "six hundred seventy-three million, four hundred twenty-six thousand, nine hundred thirty-nine".