6997979437 has 2 divisors, whose sum is σ = 6997979438. Its totient is φ = 6997979436.

The previous prime is 6997979431. The next prime is 6997979449. The reversal of 6997979437 is 7349797996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6877550761 + 120428676 = 82931^2 + 10974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6997979437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6997979431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3498989718 + 3498989719.

It is an arithmetic number, because the mean of its divisors is an integer number (3498989719).

Almost surely, 2^6997979437 is an apocalyptic number.

It is an amenable number.

6997979437 is a deficient number, since it is larger than the sum of its proper divisors (1).

6997979437 is an equidigital number, since it uses as much as digits as its factorization.

6997979437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162030456, while the sum is 70.

The square root of 6997979437 is about 83653.9266083786. The cubic root of 6997979437 is about 1912.7471080139.

The spelling of 6997979437 in words is "six billion, nine hundred ninety-seven million, nine hundred seventy-nine thousand, four hundred thirty-seven".