671846993 has 4 divisors (see below), whose sum is σ = 676975728. Its totient is φ = 666718260.

The previous prime is 671846977. The next prime is 671847019. The reversal of 671846993 is 399648176.

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 671846993 - 2⁴ = 671846977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671846933) 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, 2564171 + ... + 2564432.

It is an arithmetic number, because the mean of its divisors is an integer number (169243932).

Almost surely, 2^671846993 is an apocalyptic number.

It is an amenable number.

671846993 is a deficient number, since it is larger than the sum of its proper divisors (5128735).

671846993 is a wasteful number, since it uses less digits than its factorization.

671846993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128734.

The product of its digits is 1959552, while the sum is 53.

The square root of 671846993 is about 25920.0114390407. The cubic root of 671846993 is about 875.8373450461.

The spelling of 671846993 in words is "six hundred seventy-one million, eight hundred forty-six thousand, nine hundred ninety-three".