671481407 has 4 divisors (see below), whose sum is σ = 671555976. Its totient is φ = 671406840.

The previous prime is 671481401. The next prime is 671481409. The reversal of 671481407 is 704184176.

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 is a cyclic number.

It is not a de Polignac number, because 671481407 - 2²⁰ = 670432831 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 (671481401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21569 + ... + 42522.

It is an arithmetic number, because the mean of its divisors is an integer number (167888994).

Almost surely, 2^671481407 is an apocalyptic number.

671481407 is a deficient number, since it is larger than the sum of its proper divisors (74569).

671481407 is a wasteful number, since it uses less digits than its factorization.

671481407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74568.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 671481407 is about 25912.9582834535. The cubic root of 671481407 is about 875.6784537259.

The spelling of 671481407 in words is "six hundred seventy-one million, four hundred eighty-one thousand, four hundred seven".