672884217 has 12 divisors (see below), whose sum is σ = 972506964. Its totient is φ = 448329600.

The previous prime is 672884209. The next prime is 672884231. The reversal of 672884217 is 712488276.

It can be written as a sum of positive squares in 2 ways, for example, as 286997481 + 385886736 = 16941^2 + 19644^2 .

It is not a de Polignac number, because 672884217 - 2³ = 672884209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (672884207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4548 + ... + 36965.

It is an arithmetic number, because the mean of its divisors is an integer number (81042247).

Almost surely, 2^672884217 is an apocalyptic number.

It is an amenable number.

672884217 is a deficient number, since it is larger than the sum of its proper divisors (299622747).

672884217 is a wasteful number, since it uses less digits than its factorization.

672884217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43320 (or 43317 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 672884217 is about 25940.0118928269. The cubic root of 672884217 is about 876.2878307616.

The spelling of 672884217 in words is "six hundred seventy-two million, eight hundred eighty-four thousand, two hundred seventeen".