672789 has 12 divisors (see below), whose sum is σ = 972096. Its totient is φ = 413712.

The previous prime is 672787. The next prime is 672799. The reversal of 672789 is 987276.

It is not a de Polignac number, because 672789 - 2¹ = 672787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an alternating number because its digits alternate between even and odd.

672789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157 + ... + 1170.

It is an arithmetic number, because the mean of its divisors is an integer number (81008).

2⁶⁷²⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

672789 is a deficient number, since it is larger than the sum of its proper divisors (299307).

672789 is a wasteful number, since it uses less digits than its factorization.

672789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356 (or 1343 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 672789 is about 820.2371608261. The cubic root of 672789 is about 87.6246495550.

The spelling of 672789 in words is "six hundred seventy-two thousand, seven hundred eighty-nine".