13911047 has 2 divisors, whose sum is σ = 13911048. Its totient is φ = 13911046.

The previous prime is 13911043. The next prime is 13911071. The reversal of 13911047 is 74011931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13911047 - 2² = 13911043 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13911043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6955523 + 6955524.

It is an arithmetic number, because the mean of its divisors is an integer number (6955524).

Almost surely, 2^13911047 is an apocalyptic number.

13911047 is a deficient number, since it is larger than the sum of its proper divisors (1).

13911047 is an equidigital number, since it uses as much as digits as its factorization.

13911047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 13911047 is about 3729.7516003080. The cubic root of 13911047 is about 240.5026905703.

Adding to 13911047 its reverse (74011931), we get a palindrome (87922978).

The spelling of 13911047 in words is "thirteen million, nine hundred eleven thousand, forty-seven".