671199959 has 2 divisors, whose sum is σ = 671199960. Its totient is φ = 671199958.

The previous prime is 671199931. The next prime is 671200021. The reversal of 671199959 is 959991176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671199959 - 2⁸ = 671199703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671199929) 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, 335599979 + 335599980.

It is an arithmetic number, because the mean of its divisors is an integer number (335599980).

Almost surely, 2^671199959 is an apocalyptic number.

671199959 is a deficient number, since it is larger than the sum of its proper divisors (1).

671199959 is an equidigital number, since it uses as much as digits as its factorization.

671199959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1377810, while the sum is 56.

The square root of 671199959 is about 25907.5270722622. The cubic root of 671199959 is about 875.5560912456.

The spelling of 671199959 in words is "six hundred seventy-one million, one hundred ninety-nine thousand, nine hundred fifty-nine".