7997338949 has 4 divisors (see below), whose sum is σ = 8087196780. Its totient is φ = 7907481120.

The previous prime is 7997338907. The next prime is 7997338991. The reversal of 7997338949 is 9498337997.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (7997338907) and next prime (7997338991).

It can be written as a sum of positive squares in 2 ways, for example, as 4916533924 + 3080805025 = 70118^2 + 55505^2 .

It is a cyclic number.

It is not a de Polignac number, because 7997338949 - 2²⁰ = 7996290373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7997338649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44928782 + ... + 44928959.

It is an arithmetic number, because the mean of its divisors is an integer number (2021799195).

Almost surely, 2^7997338949 is an apocalyptic number.

It is an amenable number.

7997338949 is a deficient number, since it is larger than the sum of its proper divisors (89857831).

7997338949 is an equidigital number, since it uses as much as digits as its factorization.

7997338949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89857830.

The product of its digits is 92588832, while the sum is 68.

The square root of 7997338949 is about 89427.8421354334. The cubic root of 7997338949 is about 1999.7782211580.

The spelling of 7997338949 in words is "seven billion, nine hundred ninety-seven million, three hundred thirty-eight thousand, nine hundred forty-nine".