671421946 has 8 divisors (see below), whose sum is σ = 1084604724. Its totient is φ = 309887040.

The previous prime is 671421923. The next prime is 671421991. The reversal of 671421946 is 649124176.

It can be written as a sum of positive squares in 2 ways, for example, as 671379921 + 42025 = 25911^2 + 205^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 671421899 and 671421908.

It is an unprimeable number.

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, 12911935 + ... + 12911986.

Almost surely, 2^671421946 is an apocalyptic number.

671421946 is a deficient number, since it is larger than the sum of its proper divisors (413182778).

671421946 is a wasteful number, since it uses less digits than its factorization.

671421946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25823936.

The product of its digits is 72576, while the sum is 40.

The square root of 671421946 is about 25911.8109363279. The cubic root of 671421946 is about 875.6526052794.

The spelling of 671421946 in words is "six hundred seventy-one million, four hundred twenty-one thousand, nine hundred forty-six".