671852591 has 2 divisors, whose sum is σ = 671852592. Its totient is φ = 671852590.

The previous prime is 671852579. The next prime is 671852651. The reversal of 671852591 is 195258176.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671852591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671852501) 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, 335926295 + 335926296.

It is an arithmetic number, because the mean of its divisors is an integer number (335926296).

Almost surely, 2^671852591 is an apocalyptic number.

671852591 is a deficient number, since it is larger than the sum of its proper divisors (1).

671852591 is an equidigital number, since it uses as much as digits as its factorization.

671852591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 44.

The square root of 671852591 is about 25920.1194248792. The cubic root of 671852591 is about 875.8397776058.

The spelling of 671852591 in words is "six hundred seventy-one million, eight hundred fifty-two thousand, five hundred ninety-one".