673390313 has 2 divisors, whose sum is σ = 673390314. Its totient is φ = 673390312.

The previous prime is 673390309. The next prime is 673390351. The reversal of 673390313 is 313093376.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 567773584 + 105616729 = 23828^2 + 10277^2 .

It is a cyclic number.

It is not a de Polignac number, because 673390313 - 2² = 673390309 is a prime.

It is not a weakly prime, because it can be changed into another prime (673390373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336695156 + 336695157.

It is an arithmetic number, because the mean of its divisors is an integer number (336695157).

Almost surely, 2^673390313 is an apocalyptic number.

It is an amenable number.

673390313 is a deficient number, since it is larger than the sum of its proper divisors (1).

673390313 is an equidigital number, since it uses as much as digits as its factorization.

673390313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 35.

The square root of 673390313 is about 25949.7651819819. The cubic root of 673390313 is about 876.5074696509.

The spelling of 673390313 in words is "six hundred seventy-three million, three hundred ninety thousand, three hundred thirteen".