13998911 has 2 divisors, whose sum is σ = 13998912. Its totient is φ = 13998910.

The previous prime is 13998889. The next prime is 13998923. The reversal of 13998911 is 11989931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13998911 - 2⁶ = 13998847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13998311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6999455 + 6999456.

It is an arithmetic number, because the mean of its divisors is an integer number (6999456).

Almost surely, 2^13998911 is an apocalyptic number.

13998911 is a deficient number, since it is larger than the sum of its proper divisors (1).

13998911 is an equidigital number, since it uses as much as digits as its factorization.

13998911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 41.

The square root of 13998911 is about 3741.5118601977. The cubic root of 13998911 is about 241.0079771009.

The spelling of 13998911 in words is "thirteen million, nine hundred ninety-eight thousand, nine hundred eleven".