671959894 has 8 divisors (see below), whose sum is σ = 1009471320. Its totient is φ = 335469456.

The previous prime is 671959891. The next prime is 671959907. The reversal of 671959894 is 498959176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671959891) 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, 253599 + ... + 256234.

It is an arithmetic number, because the mean of its divisors is an integer number (126183915).

Almost surely, 2^671959894 is an apocalyptic number.

671959894 is a deficient number, since it is larger than the sum of its proper divisors (337511426).

671959894 is a wasteful number, since it uses less digits than its factorization.

671959894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510494.

The product of its digits is 4898880, while the sum is 58.

The square root of 671959894 is about 25922.1892208201. The cubic root of 671959894 is about 875.8864025322.

The spelling of 671959894 in words is "six hundred seventy-one million, nine hundred fifty-nine thousand, eight hundred ninety-four".