671275289 has 4 divisors (see below), whose sum is σ = 672085860. Its totient is φ = 670464720.

The previous prime is 671275261. The next prime is 671275313. The reversal of 671275289 is 982572176.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356567689 + 314707600 = 18883^2 + 17740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671275289 is a prime.

It is a super-2 number, since 2×671275289² = 901221027244067042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671275219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404042 + ... + 405699.

It is an arithmetic number, because the mean of its divisors is an integer number (168021465).

Almost surely, 2^671275289 is an apocalyptic number.

It is an amenable number.

671275289 is a deficient number, since it is larger than the sum of its proper divisors (810571).

671275289 is an equidigital number, since it uses as much as digits as its factorization.

671275289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810570.

The product of its digits is 423360, while the sum is 47.

The square root of 671275289 is about 25908.9808560661. The cubic root of 671275289 is about 875.5888451079.

The spelling of 671275289 in words is "six hundred seventy-one million, two hundred seventy-five thousand, two hundred eighty-nine".