671491442 has 16 divisors (see below), whose sum is σ = 1017764352. Its totient is φ = 332255280.

The previous prime is 671491441. The next prime is 671491453. The reversal of 671491442 is 244194176.

It is a junction number, because it is equal to n+sod(n) for n = 671491396 and 671491405.

It is not an unprimeable number, because it can be changed into a prime (671491441) 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 7 ways as a sum of consecutive naturals, for example, 70793 + ... + 79715.

It is an arithmetic number, because the mean of its divisors is an integer number (63610272).

Almost surely, 2^671491442 is an apocalyptic number.

671491442 is a deficient number, since it is larger than the sum of its proper divisors (346272910).

671491442 is a wasteful number, since it uses less digits than its factorization.

671491442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9313.

The product of its digits is 48384, while the sum is 38.

The square root of 671491442 is about 25913.1519117224. The cubic root of 671491442 is about 875.6828159164.

The spelling of 671491442 in words is "six hundred seventy-one million, four hundred ninety-one thousand, four hundred forty-two".