13438933 has 2 divisors, whose sum is σ = 13438934. Its totient is φ = 13438932.

The previous prime is 13438921. The next prime is 13438967. The reversal of 13438933 is 33983431.

It is an a-pointer prime, because the next prime (13438967) can be obtained adding 13438933 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11242609 + 2196324 = 3353^2 + 1482^2 .

It is an emirp because it is prime and its reverse (33983431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13438933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13438913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6719466 + 6719467.

It is an arithmetic number, because the mean of its divisors is an integer number (6719467).

Almost surely, 2^13438933 is an apocalyptic number.

It is an amenable number.

13438933 is a deficient number, since it is larger than the sum of its proper divisors (1).

13438933 is an equidigital number, since it uses as much as digits as its factorization.

13438933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 13438933 is about 3665.9150290207. The cubic root of 13438933 is about 237.7505861139.

The spelling of 13438933 in words is "thirteen million, four hundred thirty-eight thousand, nine hundred thirty-three".