672749439 has 4 divisors (see below), whose sum is σ = 896999256. Its totient is φ = 448499624.

The previous prime is 672749431. The next prime is 672749461. The reversal of 672749439 is 934947276.

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

It is a cyclic number.

It is not a de Polignac number, because 672749439 - 2³ = 672749431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 672749391 and 672749400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672749431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112124904 + ... + 112124909.

It is an arithmetic number, because the mean of its divisors is an integer number (224249814).

Almost surely, 2^672749439 is an apocalyptic number.

672749439 is a deficient number, since it is larger than the sum of its proper divisors (224249817).

672749439 is a wasteful number, since it uses less digits than its factorization.

672749439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224249816.

The product of its digits is 2286144, while the sum is 51.

The square root of 672749439 is about 25937.4138841944. The cubic root of 672749439 is about 876.2293203450.

The spelling of 672749439 in words is "six hundred seventy-two million, seven hundred forty-nine thousand, four hundred thirty-nine".