672009 has 8 divisors (see below), whose sum is σ = 964992. Its totient is φ = 413520.

The previous prime is 671999. The next prime is 672019. The reversal of 672009 is 900276.

It is an interprime number because it is at equal distance from previous prime (671999) and next prime (672019).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 672009 - 2⁸ = 671753 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 672009.

It is not an unprimeable number, because it can be changed into a prime (672019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8577 + ... + 8654.

It is an arithmetic number, because the mean of its divisors is an integer number (120624).

2⁶⁷²⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

672009 is a deficient number, since it is larger than the sum of its proper divisors (292983).

672009 is a wasteful number, since it uses less digits than its factorization.

672009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17247.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 672009 is about 819.7615506963. The cubic root of 672009 is about 87.5907738245.

The spelling of 672009 in words is "six hundred seventy-two thousand, nine".