671545013 has 4 divisors (see below), whose sum is σ = 671626368. Its totient is φ = 671463660.

The previous prime is 671545003. The next prime is 671545037. The reversal of 671545013 is 310545176.

671545013 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 Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 671545013 - 2⁴ = 671544997 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 (671545003) 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, 26693 + ... + 45338.

It is an arithmetic number, because the mean of its divisors is an integer number (167906592).

Almost surely, 2^671545013 is an apocalyptic number.

It is an amenable number.

671545013 is a deficient number, since it is larger than the sum of its proper divisors (81355).

671545013 is an equidigital number, since it uses as much as digits as its factorization.

671545013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81354.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 671545013 is about 25914.1855554057. The cubic root of 671545013 is about 875.7061023669.

The spelling of 671545013 in words is "six hundred seventy-one million, five hundred forty-five thousand, thirteen".