8120026993 has 12 divisors (see below), whose sum is σ = 9030339228. Its totient is φ = 7292825280.

The previous prime is 8120026961. The next prime is 8120027063. The reversal of 8120026993 is 3996200218.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1861318449 + 6258708544 = 43143^2 + 79112^2 .

It is not a de Polignac number, because 8120026993 - 2⁵ = 8120026961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8120026193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 643038 + ... + 655543.

It is an arithmetic number, because the mean of its divisors is an integer number (752528269).

Almost surely, 2^8120026993 is an apocalyptic number.

It is an amenable number.

8120026993 is a deficient number, since it is larger than the sum of its proper divisors (910312235).

8120026993 is a wasteful number, since it uses less digits than its factorization.

8120026993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298644 (or 1298631 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 8120026993 is about 90111.1923847421. The cubic root of 8120026993 is about 2009.9526397428.

The spelling of 8120026993 in words is "eight billion, one hundred twenty million, twenty-six thousand, nine hundred ninety-three".