794781221 has 16 divisors (see below), whose sum is σ = 894242160. Its totient is φ = 701299200.

The previous prime is 794781217. The next prime is 794781241. The reversal of 794781221 is 122187497.

It can be written as a sum of positive squares in 8 ways, for example, as 330625 + 794450596 = 575^2 + 28186^2 .

It is a cyclic number.

It is not a de Polignac number, because 794781221 - 2² = 794781217 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (794781241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27641 + ... + 48513.

It is an arithmetic number, because the mean of its divisors is an integer number (55890135).

Almost surely, 2^794781221 is an apocalyptic number.

It is an amenable number.

794781221 is a deficient number, since it is larger than the sum of its proper divisors (99460939).

794781221 is a wasteful number, since it uses less digits than its factorization.

794781221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21016.

The product of its digits is 56448, while the sum is 41.

The square root of 794781221 is about 28191.8644470351. The cubic root of 794781221 is about 926.2947424149.

The spelling of 794781221 in words is "seven hundred ninety-four million, seven hundred eighty-one thousand, two hundred twenty-one".