673979 has 2 divisors, whose sum is σ = 673980. Its totient is φ = 673978.

The previous prime is 673961. The next prime is 673991. The reversal of 673979 is 979376.

673979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673979 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 7³ + 9⁵ + 3⁹ + 7⁵ + 9⁶ .

It is not a weakly prime, because it can be changed into another prime (673579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336989 + 336990.

It is an arithmetic number, because the mean of its divisors is an integer number (336990).

2⁶⁷³⁹⁷⁹ is an apocalyptic number.

673979 is a deficient number, since it is larger than the sum of its proper divisors (1).

673979 is an equidigital number, since it uses as much as digits as its factorization.

673979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 41.

The square root of 673979 is about 820.9622403010. The cubic root of 673979 is about 87.6762813520.

The spelling of 673979 in words is "six hundred seventy-three thousand, nine hundred seventy-nine".