6989137920049 has 2 divisors, whose sum is σ = 6989137920050. Its totient is φ = 6989137920048.

The previous prime is 6989137919977. The next prime is 6989137920113. The reversal of 6989137920049 is 9400297319896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6480369561649 + 508768358400 = 2545657^2 + 713280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6989137920049 is a prime.

It is not a weakly prime, because it can be changed into another prime (6989137921049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494568960024 + 3494568960025.

It is an arithmetic number, because the mean of its divisors is an integer number (3494568960025).

Almost surely, 2^{6989137920049} is an apocalyptic number.

It is an amenable number.

6989137920049 is a deficient number, since it is larger than the sum of its proper divisors (1).

6989137920049 is an equidigital number, since it uses as much as digits as its factorization.

6989137920049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52907904, while the sum is 67.

The spelling of 6989137920049 in words is "six trillion, nine hundred eighty-nine billion, one hundred thirty-seven million, nine hundred twenty thousand, forty-nine".