672109 has 4 divisors (see below), whose sum is σ = 674080. Its totient is φ = 670140.

The previous prime is 672107. The next prime is 672127. The reversal of 672109 is 901276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 672109 - 2¹ = 672107 is a prime.

It is an Ulam number.

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

It is a Duffinian number.

672109 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327 + ... + 1204.

It is an arithmetic number, because the mean of its divisors is an integer number (168520).

2⁶⁷²¹⁰⁹ is an apocalyptic number.

It is an amenable number.

672109 is a deficient number, since it is larger than the sum of its proper divisors (1971).

672109 is a wasteful number, since it uses less digits than its factorization.

672109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 672109 is about 819.8225417735. The cubic root of 672109 is about 87.5951183313.

The spelling of 672109 in words is "six hundred seventy-two thousand, one hundred nine".