13240341991 has 2 divisors, whose sum is σ = 13240341992. Its totient is φ = 13240341990.

The previous prime is 13240341979. The next prime is 13240342057. The reversal of 13240341991 is 19914304231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13240341991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13240341991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13240341911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6620170995 + 6620170996.

It is an arithmetic number, because the mean of its divisors is an integer number (6620170996).

Almost surely, 2^13240341991 is an apocalyptic number.

13240341991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13240341991 is an equidigital number, since it uses as much as digits as its factorization.

13240341991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 13240341991 in words is "thirteen billion, two hundred forty million, three hundred forty-one thousand, nine hundred ninety-one".