671143807 has 2 divisors, whose sum is σ = 671143808. Its totient is φ = 671143806.

The previous prime is 671143793. The next prime is 671143813. The reversal of 671143807 is 708341176.

671143807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671143807 - 2²³ = 662755199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671143817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335571903 + 335571904.

It is an arithmetic number, because the mean of its divisors is an integer number (335571904).

Almost surely, 2^671143807 is an apocalyptic number.

671143807 is a deficient number, since it is larger than the sum of its proper divisors (1).

671143807 is an equidigital number, since it uses as much as digits as its factorization.

671143807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 671143807 is about 25906.4433490975. The cubic root of 671143807 is about 875.5316744797.

The spelling of 671143807 in words is "six hundred seventy-one million, one hundred forty-three thousand, eight hundred seven".