13126991 has 2 divisors, whose sum is σ = 13126992. Its totient is φ = 13126990.

The previous prime is 13126963. The next prime is 13127027. The reversal of 13126991 is 19962131.

13126991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13126991 - 2¹⁴ = 13110607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13126901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6563495 + 6563496.

It is an arithmetic number, because the mean of its divisors is an integer number (6563496).

Almost surely, 2^13126991 is an apocalyptic number.

13126991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13126991 is an equidigital number, since it uses as much as digits as its factorization.

13126991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 32.

The square root of 13126991 is about 3623.1189602330. The cubic root of 13126991 is about 235.8966259413.

The spelling of 13126991 in words is "thirteen million, one hundred twenty-six thousand, nine hundred ninety-one".