6977981747497 has 2 divisors, whose sum is σ = 6977981747498. Its totient is φ = 6977981747496.

The previous prime is 6977981747467. The next prime is 6977981747531. The reversal of 6977981747497 is 7947471897796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6251505090601 + 726476656896 = 2500301^2 + 852336^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6977981747497 is a prime.

It is not a weakly prime, because it can be changed into another prime (6977981747437) 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, 3488990873748 + 3488990873749.

It is an arithmetic number, because the mean of its divisors is an integer number (3488990873749).

Almost surely, 2^{6977981747497} is an apocalyptic number.

It is an amenable number.

6977981747497 is a deficient number, since it is larger than the sum of its proper divisors (1).

6977981747497 is an equidigital number, since it uses as much as digits as its factorization.

6977981747497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9409768704, while the sum is 85.

The spelling of 6977981747497 in words is "six trillion, nine hundred seventy-seven billion, nine hundred eighty-one million, seven hundred forty-seven thousand, four hundred ninety-seven".