8279257797 has 24 divisors (see below), whose sum is σ = 12535531008. Its totient is φ = 5259643200.

The previous prime is 8279257793. The next prime is 8279257807. The reversal of 8279257797 is 7977529728.

It is not a de Polignac number, because 8279257797 - 2² = 8279257793 is a prime.

It is a super-2 number, since 2×8279257797² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8279257793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245029 + ... + 276762.

It is an arithmetic number, because the mean of its divisors is an integer number (522313792).

Almost surely, 2^8279257797 is an apocalyptic number.

It is an amenable number.

8279257797 is a deficient number, since it is larger than the sum of its proper divisors (4256273211).

8279257797 is a wasteful number, since it uses less digits than its factorization.

8279257797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521881 (or 521878 counting only the distinct ones).

The product of its digits is 31116960, while the sum is 63.

The square root of 8279257797 is about 90990.4269525097. The cubic root of 8279257797 is about 2023.0058341915.

The spelling of 8279257797 in words is "eight billion, two hundred seventy-nine million, two hundred fifty-seven thousand, seven hundred ninety-seven".