671598013 has 4 divisors (see below), whose sum is σ = 671652540. Its totient is φ = 671543488.

The previous prime is 671598001. The next prime is 671598023. The reversal of 671598013 is 310895176.

671598013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 227315929 + 444282084 = 15077^2 + 21078^2 .

It is a cyclic number.

It is not a de Polignac number, because 671598013 - 2⁹ = 671597501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671598023) 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, 933 + ... + 36661.

It is an arithmetic number, because the mean of its divisors is an integer number (167913135).

Almost surely, 2^671598013 is an apocalyptic number.

It is an amenable number.

671598013 is a deficient number, since it is larger than the sum of its proper divisors (54527).

671598013 is a wasteful number, since it uses less digits than its factorization.

671598013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54526.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 671598013 is about 25915.2081411668. The cubic root of 671598013 is about 875.7291393943.

The spelling of 671598013 in words is "six hundred seventy-one million, five hundred ninety-eight thousand, thirteen".