671845093 has 4 divisors (see below), whose sum is σ = 671905420. Its totient is φ = 671784768.

The previous prime is 671845081. The next prime is 671845103. The reversal of 671845093 is 390548176.

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 366224769 + 305620324 = 19137^2 + 17482^2 .

It is a cyclic number.

It is not a de Polignac number, because 671845093 - 2⁹ = 671844581 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 (671845063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8058 + ... + 37531.

It is an arithmetic number, because the mean of its divisors is an integer number (167976355).

Almost surely, 2^671845093 is an apocalyptic number.

It is an amenable number.

671845093 is a deficient number, since it is larger than the sum of its proper divisors (60327).

671845093 is a wasteful number, since it uses less digits than its factorization.

671845093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60326.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 671845093 is about 25919.9747877964. The cubic root of 671845093 is about 875.8365194154.

The spelling of 671845093 in words is "six hundred seventy-one million, eight hundred forty-five thousand, ninety-three".