72798209 has 8 divisors (see below), whose sum is σ = 80236128. Its totient is φ = 65496960.

The previous prime is 72798181. The next prime is 72798223. The reversal of 72798209 is 90289727.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72798209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72798209.

It is not an unprimeable number, because it can be changed into a prime (72798239) 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, 33047 + ... + 35180.

It is an arithmetic number, because the mean of its divisors is an integer number (10029516).

Almost surely, 2^72798209 is an apocalyptic number.

It is an amenable number.

72798209 is a deficient number, since it is larger than the sum of its proper divisors (7437919).

72798209 is a wasteful number, since it uses less digits than its factorization.

72798209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68335.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 72798209 is about 8532.1866482163. The cubic root of 72798209 is about 417.5484715496.

The spelling of 72798209 in words is "seventy-two million, seven hundred ninety-eight thousand, two hundred nine".