6999339997 has 6 divisors (see below), whose sum is σ = 7579167162. Its totient is φ = 6460929072.

The previous prime is 6999339989. The next prime is 6999340003. The reversal of 6999339997 is 7999339996.

It can be written as a sum of positive squares in 3 ways, for example, as 979752601 + 6019587396 = 31301^2 + 77586^2 .

It is not a de Polignac number, because 6999339997 - 2³ = 6999339989 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 (6999339397) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20707938 + ... + 20708275.

It is an arithmetic number, because the mean of its divisors is an integer number (1263194527).

Almost surely, 2^6999339997 is an apocalyptic number.

It is an amenable number.

6999339997 is a deficient number, since it is larger than the sum of its proper divisors (579827165).

6999339997 is a wasteful number, since it uses less digits than its factorization.

6999339997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41416239 (or 41416226 counting only the distinct ones).

The product of its digits is 200884698, while the sum is 73.

The square root of 6999339997 is about 83662.0582880914. The cubic root of 6999339997 is about 1912.8710599152.

Subtracting 6999339997 from its reverse (7999339996), we obtain a palindrome (999999999).

The spelling of 6999339997 in words is "six billion, nine hundred ninety-nine million, three hundred thirty-nine thousand, nine hundred ninety-seven".