797283821 has 4 divisors (see below), whose sum is σ = 801892572. Its totient is φ = 792675072.

The previous prime is 797283811. The next prime is 797283841. The reversal of 797283821 is 128382797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 128382797 = 29 ⋅4426993.

It can be written as a sum of positive squares in 2 ways, for example, as 298252900 + 499030921 = 17270^2 + 22339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-797283821 is a prime.

It is a super-2 number, since 2×797283821² = 1271322982456720082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797283811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2304116 + ... + 2304461.

It is an arithmetic number, because the mean of its divisors is an integer number (200473143).

Almost surely, 2^797283821 is an apocalyptic number.

It is an amenable number.

797283821 is a deficient number, since it is larger than the sum of its proper divisors (4608751).

797283821 is a wasteful number, since it uses less digits than its factorization.

797283821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608750.

The product of its digits is 338688, while the sum is 47.

The square root of 797283821 is about 28236.2147073576. The cubic root of 797283821 is about 927.2659599401.

The spelling of 797283821 in words is "seven hundred ninety-seven million, two hundred eighty-three thousand, eight hundred twenty-one".