673781699 has 2 divisors, whose sum is σ = 673781700. Its totient is φ = 673781698.

The previous prime is 673781657. The next prime is 673781753. The reversal of 673781699 is 996187376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 673781699 - 2⁸ = 673781443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (673781299) 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, 336890849 + 336890850.

It is an arithmetic number, because the mean of its divisors is an integer number (336890850).

Almost surely, 2^673781699 is an apocalyptic number.

673781699 is a deficient number, since it is larger than the sum of its proper divisors (1).

673781699 is an equidigital number, since it uses as much as digits as its factorization.

673781699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 56.

The square root of 673781699 is about 25957.3053108369. The cubic root of 673781699 is about 876.6772504871.

The spelling of 673781699 in words is "six hundred seventy-three million, seven hundred eighty-one thousand, six hundred ninety-nine".