673768987 has 2 divisors, whose sum is σ = 673768988. Its totient is φ = 673768986.

The previous prime is 673768981. The next prime is 673768993. The reversal of 673768987 is 789867376.

It is a balanced prime because it is at equal distance from previous prime (673768981) and next prime (673768993).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673768987 is a prime.

It is not a weakly prime, because it can be changed into another prime (673768981) 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, 336884493 + 336884494.

It is an arithmetic number, because the mean of its divisors is an integer number (336884494).

Almost surely, 2^673768987 is an apocalyptic number.

673768987 is a deficient number, since it is larger than the sum of its proper divisors (1).

673768987 is an equidigital number, since it uses as much as digits as its factorization.

673768987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21337344, while the sum is 61.

The square root of 673768987 is about 25957.0604460521. The cubic root of 673768987 is about 876.6717371330.

The spelling of 673768987 in words is "six hundred seventy-three million, seven hundred sixty-eight thousand, nine hundred eighty-seven".