672399 has 24 divisors (see below), whose sum is σ = 1196832. Its totient is φ = 354240.

The previous prime is 672379. The next prime is 672439. The reversal of 672399 is 993276.

672399 = 2³ + 3³ + ... + 40³.

It is a Cunningham number, because it is equal to 820²-1.

It is not a de Polignac number, because 672399 - 2⁷ = 672271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 409 + ... + 1229.

It is an arithmetic number, because the mean of its divisors is an integer number (49868).

2⁶⁷²³⁹⁹ is an apocalyptic number.

672399 is a deficient number, since it is larger than the sum of its proper divisors (524433).

672399 is a wasteful number, since it uses less digits than its factorization.

672399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847 (or 844 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 672399 is about 819.9993902437. Note that the first 3 decimals coincide. The cubic root of 672399 is about 87.6077149645.

The spelling of 672399 in words is "six hundred seventy-two thousand, three hundred ninety-nine".