13505923 has 2 divisors, whose sum is σ = 13505924. Its totient is φ = 13505922.

The previous prime is 13505911. The next prime is 13505983. The reversal of 13505923 is 32950531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13505923 - 2⁹ = 13505411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13505891 and 13505900.

It is not a weakly prime, because it can be changed into another prime (13505983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6752961 + 6752962.

It is an arithmetic number, because the mean of its divisors is an integer number (6752962).

Almost surely, 2^13505923 is an apocalyptic number.

13505923 is a deficient number, since it is larger than the sum of its proper divisors (1).

13505923 is an equidigital number, since it uses as much as digits as its factorization.

13505923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 13505923 is about 3675.0405439940. The cubic root of 13505923 is about 238.1449755794.

The spelling of 13505923 in words is "thirteen million, five hundred five thousand, nine hundred twenty-three".