672946138 has 4 divisors (see below), whose sum is σ = 1009419210. Its totient is φ = 336473068.

The previous prime is 672946129. The next prime is 672946163. The reversal of 672946138 is 831649276.

672946138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 597655809 + 75290329 = 24447^2 + 8677^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168236533 + ... + 168236536.

Almost surely, 2^672946138 is an apocalyptic number.

672946138 is a deficient number, since it is larger than the sum of its proper divisors (336473072).

672946138 is a wasteful number, since it uses less digits than its factorization.

672946138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336473071.

The product of its digits is 435456, while the sum is 46.

The square root of 672946138 is about 25941.2054076136. The cubic root of 672946138 is about 876.3147095584.

The spelling of 672946138 in words is "six hundred seventy-two million, nine hundred forty-six thousand, one hundred thirty-eight".