13438673 has 2 divisors, whose sum is σ = 13438674. Its totient is φ = 13438672.

The previous prime is 13438639. The next prime is 13438679. The reversal of 13438673 is 37683431.

It is a happy number.

13438673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7524049 + 5914624 = 2743^2 + 2432^2 .

It is a cyclic number.

It is not a de Polignac number, because 13438673 - 2⁶ = 13438609 is a prime.

It is equal to p₈₇₅₉₅₁ and since 13438673 and 875951 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13438679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6719336 + 6719337.

It is an arithmetic number, because the mean of its divisors is an integer number (6719337).

Almost surely, 2^13438673 is an apocalyptic number.

It is an amenable number.

13438673 is a deficient number, since it is larger than the sum of its proper divisors (1).

13438673 is an equidigital number, since it uses as much as digits as its factorization.

13438673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 13438673 is about 3665.8795670344. The cubic root of 13438673 is about 237.7490528684.

The spelling of 13438673 in words is "thirteen million, four hundred thirty-eight thousand, six hundred seventy-three".