671305841 has 4 divisors (see below), whose sum is σ = 685588992. Its totient is φ = 657022692.

The previous prime is 671305819. The next prime is 671305847. The reversal of 671305841 is 148503176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671305841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671305847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7141505 + ... + 7141598.

It is an arithmetic number, because the mean of its divisors is an integer number (171397248).

Almost surely, 2^671305841 is an apocalyptic number.

It is an amenable number.

671305841 is a deficient number, since it is larger than the sum of its proper divisors (14283151).

671305841 is a wasteful number, since it uses less digits than its factorization.

671305841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14283150.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 671305841 is about 25909.5704518620. The cubic root of 671305841 is about 875.6021285724.

The spelling of 671305841 in words is "six hundred seventy-one million, three hundred five thousand, eight hundred forty-one".