13505911 has 2 divisors, whose sum is σ = 13505912. Its totient is φ = 13505910.

The previous prime is 13505897. The next prime is 13505923. The reversal of 13505911 is 11950531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13505911 - 2⁷ = 13505783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13505411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6752955 + 6752956.

It is an arithmetic number, because the mean of its divisors is an integer number (6752956).

Almost surely, 2^13505911 is an apocalyptic number.

13505911 is a deficient number, since it is larger than the sum of its proper divisors (1).

13505911 is an equidigital number, since it uses as much as digits as its factorization.

13505911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 675, while the sum is 25.

The square root of 13505911 is about 3675.0389113586. The cubic root of 13505911 is about 238.1449050489.

The spelling of 13505911 in words is "thirteen million, five hundred five thousand, nine hundred eleven".