13058999981 has 2 divisors, whose sum is σ = 13058999982. Its totient is φ = 13058999980.

The previous prime is 13058999971. The next prime is 13059000011. The reversal of 13058999981 is 18999985031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13055119081 + 3880900 = 114259^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 13058999981 - 2¹⁸ = 13058737837 is a prime.

It is a super-2 number, since 2×13058999981² (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 (13058999911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6529499990 + 6529499991.

It is an arithmetic number, because the mean of its divisors is an integer number (6529499991).

Almost surely, 2^13058999981 is an apocalyptic number.

It is an amenable number.

13058999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13058999981 is an equidigital number, since it uses as much as digits as its factorization.

13058999981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6298560, while the sum is 62.

The spelling of 13058999981 in words is "thirteen billion, fifty-eight million, nine hundred ninety-nine thousand, nine hundred eighty-one".