6171977969 has 2 divisors, whose sum is σ = 6171977970. Its totient is φ = 6171977968.

The previous prime is 6171977921. The next prime is 6171977971. The reversal of 6171977969 is 9697791716.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3170253025 + 3001724944 = 56305^2 + 54788^2 .

It is a cyclic number.

It is not a de Polignac number, because 6171977969 - 2¹⁶ = 6171912433 is a prime.

It is a super-3 number, since 3×6171977969³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 6171977971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6171977269) 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 as a sum of consecutive naturals, namely, 3085988984 + 3085988985.

It is an arithmetic number, because the mean of its divisors is an integer number (3085988985).

Almost surely, 2^6171977969 is an apocalyptic number.

It is an amenable number.

6171977969 is a deficient number, since it is larger than the sum of its proper divisors (1).

6171977969 is an equidigital number, since it uses as much as digits as its factorization.

6171977969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9001692, while the sum is 62.

The square root of 6171977969 is about 78561.9371515240. The cubic root of 6171977969 is about 1834.3186812010.

The spelling of 6171977969 in words is "six billion, one hundred seventy-one million, nine hundred seventy-seven thousand, nine hundred sixty-nine".