6961249789517 has 2 divisors, whose sum is σ = 6961249789518. Its totient is φ = 6961249789516.

The previous prime is 6961249789421. The next prime is 6961249789577. The reversal of 6961249789517 is 7159879421696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3847133110921 + 3114116678596 = 1961411^2 + 1764686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6961249789517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6961249789577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3480624894758 + 3480624894759.

It is an arithmetic number, because the mean of its divisors is an integer number (3480624894759).

Almost surely, 2^{6961249789517} is an apocalyptic number.

It is an amenable number.

6961249789517 is a deficient number, since it is larger than the sum of its proper divisors (1).

6961249789517 is an equidigital number, since it uses as much as digits as its factorization.

6961249789517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 411505920, while the sum is 74.

The spelling of 6961249789517 in words is "six trillion, nine hundred sixty-one billion, two hundred forty-nine million, seven hundred eighty-nine thousand, five hundred seventeen".