673945451 has 2 divisors, whose sum is σ = 673945452. Its totient is φ = 673945450.

The previous prime is 673945387. The next prime is 673945463. The reversal of 673945451 is 154549376.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 673945451 - 2⁶ = 673945387 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (673945651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336972725 + 336972726.

It is an arithmetic number, because the mean of its divisors is an integer number (336972726).

Almost surely, 2^673945451 is an apocalyptic number.

673945451 is a deficient number, since it is larger than the sum of its proper divisors (1).

673945451 is an equidigital number, since it uses as much as digits as its factorization.

673945451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The square root of 673945451 is about 25960.4593757507. The cubic root of 673945451 is about 876.7482655874.

The spelling of 673945451 in words is "six hundred seventy-three million, nine hundred forty-five thousand, four hundred fifty-one".