797281821 has 72 divisors (see below), whose sum is σ = 1407893760. Its totient is φ = 425671488.

The previous prime is 797281817. The next prime is 797281829. The reversal of 797281821 is 128182797.

It is not a de Polignac number, because 797281821 - 2² = 797281817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797281829) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1566115 + ... + 1566623.

It is an arithmetic number, because the mean of its divisors is an integer number (19554080).

Almost surely, 2^797281821 is an apocalyptic number.

It is an amenable number.

797281821 is a deficient number, since it is larger than the sum of its proper divisors (610611939).

797281821 is a wasteful number, since it uses less digits than its factorization.

797281821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 589 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 797281821 is about 28236.1792918235. The cubic root of 797281821 is about 927.2651845853.

The spelling of 797281821 in words is "seven hundred ninety-seven million, two hundred eighty-one thousand, eight hundred twenty-one".