671969239 has 2 divisors, whose sum is σ = 671969240. Its totient is φ = 671969238.

The previous prime is 671969191. The next prime is 671969279. The reversal of 671969239 is 932969176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671969239 - 2¹⁵ = 671936471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671969279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335984619 + 335984620.

It is an arithmetic number, because the mean of its divisors is an integer number (335984620).

Almost surely, 2^671969239 is an apocalyptic number.

671969239 is a deficient number, since it is larger than the sum of its proper divisors (1).

671969239 is an equidigital number, since it uses as much as digits as its factorization.

671969239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 52.

The square root of 671969239 is about 25922.3694711730. The cubic root of 671969239 is about 875.8904628542.

The spelling of 671969239 in words is "six hundred seventy-one million, nine hundred sixty-nine thousand, two hundred thirty-nine".