2672009 has 4 divisors (see below), whose sum is σ = 2829204. Its totient is φ = 2514816.

The previous prime is 2672003. The next prime is 2672023. The reversal of 2672009 is 9002762.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9002762 = 2 ⋅4501381.

It can be written as a sum of positive squares in 2 ways, for example, as 2449225 + 222784 = 1565^2 + 472^2 .

It is a cyclic number.

It is not a de Polignac number, because 2672009 - 2¹⁶ = 2606473 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2672003) 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, 78572 + ... + 78605.

It is an arithmetic number, because the mean of its divisors is an integer number (707301).

2^2672009 is an apocalyptic number.

It is an amenable number.

2672009 is a deficient number, since it is larger than the sum of its proper divisors (157195).

2672009 is a wasteful number, since it uses less digits than its factorization.

2672009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157194.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2672009 is about 1634.6280922583. The cubic root of 2672009 is about 138.7647972748.

The spelling of 2672009 in words is "two million, six hundred seventy-two thousand, nine".