673404691 has 2 divisors, whose sum is σ = 673404692. Its totient is φ = 673404690.

The previous prime is 673404659. The next prime is 673404703. The reversal of 673404691 is 196404376.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 673404691 - 2⁵ = 673404659 is a prime.

It is not a weakly prime, because it can be changed into another prime (673404091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336702345 + 336702346.

It is an arithmetic number, because the mean of its divisors is an integer number (336702346).

Almost surely, 2^673404691 is an apocalyptic number.

673404691 is a deficient number, since it is larger than the sum of its proper divisors (1).

673404691 is an equidigital number, since it uses as much as digits as its factorization.

673404691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 673404691 is about 25950.0422157653. The cubic root of 673404691 is about 876.5137079025.

The spelling of 673404691 in words is "six hundred seventy-three million, four hundred four thousand, six hundred ninety-one".