797278209 has 64 divisors (see below), whose sum is σ = 1384642560. Its totient is φ = 396264960.

The previous prime is 797278201. The next prime is 797278219. The reversal of 797278209 is 902872797.

It is not a de Polignac number, because 797278209 - 2³ = 797278201 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (797278201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1457274 + ... + 1457820.

It is an arithmetic number, because the mean of its divisors is an integer number (21635040).

It is a Proth number, since it is equal to 24331 ⋅ 2¹⁵ + 1 and 24331 < 2¹⁵.

Almost surely, 2^797278209 is an apocalyptic number.

It is an amenable number.

797278209 is a deficient number, since it is larger than the sum of its proper divisors (587364351).

797278209 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (797278208) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (870).

797278209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its (nonzero) digits is 889056, while the sum is 51.

The square root of 797278209 is about 28236.1153312562. The cubic root of 797278209 is about 927.2637842913.

The spelling of 797278209 in words is "seven hundred ninety-seven million, two hundred seventy-eight thousand, two hundred nine".