671545117 has 2 divisors, whose sum is σ = 671545118. Its totient is φ = 671545116.

The previous prime is 671545111. The next prime is 671545123. The reversal of 671545117 is 711545176.

It is a happy number.

671545117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (671545111) and next prime (671545123).

It can be written as a sum of positive squares in only one way, i.e., 438860601 + 232684516 = 20949^2 + 15254^2 .

It is a cyclic number.

It is not a de Polignac number, because 671545117 - 2¹⁹ = 671020829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671545111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335772558 + 335772559.

It is an arithmetic number, because the mean of its divisors is an integer number (335772559).

Almost surely, 2^671545117 is an apocalyptic number.

It is an amenable number.

671545117 is a deficient number, since it is larger than the sum of its proper divisors (1).

671545117 is an equidigital number, since it uses as much as digits as its factorization.

671545117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29400, while the sum is 37.

The square root of 671545117 is about 25914.1875620286. The cubic root of 671545117 is about 875.7061475728.

The spelling of 671545117 in words is "six hundred seventy-one million, five hundred forty-five thousand, one hundred seventeen".