7072809 has 8 divisors (see below), whose sum is σ = 9685440. Its totient is φ = 4587696.

The previous prime is 7072801. The next prime is 7072811. The reversal of 7072809 is 9082707.

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

It is not a de Polignac number, because 7072809 - 2³ = 7072801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7072809.

It is not an unprimeable number, because it can be changed into a prime (7072801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31749 + ... + 31970.

It is an arithmetic number, because the mean of its divisors is an integer number (1210680).

Almost surely, 2^7072809 is an apocalyptic number.

It is an amenable number.

7072809 is a deficient number, since it is larger than the sum of its proper divisors (2612631).

7072809 is a wasteful number, since it uses less digits than its factorization.

7072809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63759.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 7072809 is about 2659.4753241946. The cubic root of 7072809 is about 191.9540634462.

The spelling of 7072809 in words is "seven million, seventy-two thousand, eight hundred nine".