13400447 has 2 divisors, whose sum is σ = 13400448. Its totient is φ = 13400446.

The previous prime is 13400441. The next prime is 13400459. The reversal of 13400447 is 74400431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13400447 - 2¹⁰ = 13399423 is a prime.

It is a super-3 number, since 3×13400447³ (a number of 22 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13400441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6700223 + 6700224.

It is an arithmetic number, because the mean of its divisors is an integer number (6700224).

Almost surely, 2^13400447 is an apocalyptic number.

13400447 is a deficient number, since it is larger than the sum of its proper divisors (1).

13400447 is an equidigital number, since it uses as much as digits as its factorization.

13400447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 13400447 is about 3660.6620985827. The cubic root of 13400447 is about 237.5234148660.

Adding to 13400447 its reverse (74400431), we get a palindrome (87800878).

The spelling of 13400447 in words is "thirteen million, four hundred thousand, four hundred forty-seven".