672821947 has 8 divisors (see below), whose sum is σ = 779473376. Its totient is φ = 568804032.

The previous prime is 672821917. The next prime is 672821969. The reversal of 672821947 is 749128276.

672821947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 672821947 - 2²⁷ = 538604219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 672821897 and 672821906.

It is not an unprimeable number, because it can be changed into a prime (672821917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657828 + ... + 658849.

It is an arithmetic number, because the mean of its divisors is an integer number (97434172).

Almost surely, 2^672821947 is an apocalyptic number.

672821947 is a deficient number, since it is larger than the sum of its proper divisors (106651429).

672821947 is a wasteful number, since it uses less digits than its factorization.

672821947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316757.

The product of its digits is 338688, while the sum is 46.

The square root of 672821947 is about 25938.8115957536. The cubic root of 672821947 is about 876.2607988071.

The spelling of 672821947 in words is "six hundred seventy-two million, eight hundred twenty-one thousand, nine hundred forty-seven".