6997979449 has 2 divisors, whose sum is σ = 6997979450. Its totient is φ = 6997979448.

The previous prime is 6997979437. The next prime is 6997979453. The reversal of 6997979449 is 9449797996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4127163049 + 2870816400 = 64243^2 + 53580^2 .

It is a cyclic number.

It is not a de Polignac number, because 6997979449 - 2²¹ = 6995882297 is a prime.

It is not a weakly prime, because it can be changed into another prime (6997979479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3498989724 + 3498989725.

It is an arithmetic number, because the mean of its divisors is an integer number (3498989725).

Almost surely, 2^6997979449 is an apocalyptic number.

It is an amenable number.

6997979449 is a deficient number, since it is larger than the sum of its proper divisors (1).

6997979449 is an equidigital number, since it uses as much as digits as its factorization.

6997979449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 277766496, while the sum is 73.

The square root of 6997979449 is about 83653.9266801027. The cubic root of 6997979449 is about 1912.7471091072.

The spelling of 6997979449 in words is "six billion, nine hundred ninety-seven million, nine hundred seventy-nine thousand, four hundred forty-nine".