673712399 has 2 divisors, whose sum is σ = 673712400. Its totient is φ = 673712398.

The previous prime is 673712381. The next prime is 673712423. The reversal of 673712399 is 993217376.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 673712399 - 2¹² = 673708303 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673712099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336856199 + 336856200.

It is an arithmetic number, because the mean of its divisors is an integer number (336856200).

Almost surely, 2^673712399 is an apocalyptic number.

673712399 is a deficient number, since it is larger than the sum of its proper divisors (1).

673712399 is an equidigital number, since it uses as much as digits as its factorization.

673712399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 47.

The square root of 673712399 is about 25955.9703921853. The cubic root of 673712399 is about 876.6471933649.

The spelling of 673712399 in words is "six hundred seventy-three million, seven hundred twelve thousand, three hundred ninety-nine".