13230991 has 2 divisors, whose sum is σ = 13230992. Its totient is φ = 13230990.

The previous prime is 13230983. The next prime is 13231019. The reversal of 13230991 is 19903231.

It is an a-pointer prime, because the next prime (13231019) can be obtained adding 13230991 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13230991 - 2³ = 13230983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13230901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615495 + 6615496.

It is an arithmetic number, because the mean of its divisors is an integer number (6615496).

Almost surely, 2^13230991 is an apocalyptic number.

13230991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13230991 is an equidigital number, since it uses as much as digits as its factorization.

13230991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 13230991 is about 3637.4429205144. The cubic root of 13230991 is about 236.5179600984.

The spelling of 13230991 in words is "thirteen million, two hundred thirty thousand, nine hundred ninety-one".