13261062989 has 2 divisors, whose sum is σ = 13261062990. Its totient is φ = 13261062988.

The previous prime is 13261062979. The next prime is 13261063007. The reversal of 13261062989 is 98926016231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9538842889 + 3722220100 = 97667^2 + 61010^2 .

It is a cyclic number.

It is not a de Polignac number, because 13261062989 - 2⁸ = 13261062733 is a prime.

It is a super-2 number, since 2×13261062989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13261062929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6630531494 + 6630531495.

It is an arithmetic number, because the mean of its divisors is an integer number (6630531495).

Almost surely, 2^13261062989 is an apocalyptic number.

It is an amenable number.

13261062989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13261062989 is an equidigital number, since it uses as much as digits as its factorization.

13261062989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 13261062989 in words is "thirteen billion, two hundred sixty-one million, sixty-two thousand, nine hundred eighty-nine".