673270991 has 2 divisors, whose sum is σ = 673270992. Its totient is φ = 673270990.

The previous prime is 673270979. The next prime is 673270993. The reversal of 673270991 is 199072376.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673270991 is a prime.

Together with 673270993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673270993) 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, 336635495 + 336635496.

It is an arithmetic number, because the mean of its divisors is an integer number (336635496).

Almost surely, 2^673270991 is an apocalyptic number.

673270991 is a deficient number, since it is larger than the sum of its proper divisors (1).

673270991 is an equidigital number, since it uses as much as digits as its factorization.

673270991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 673270991 is about 25947.4659841766. The cubic root of 673270991 is about 876.4556954172.

The spelling of 673270991 in words is "six hundred seventy-three million, two hundred seventy thousand, nine hundred ninety-one".