13481399 has 2 divisors, whose sum is σ = 13481400. Its totient is φ = 13481398.

The previous prime is 13481383. The next prime is 13481401. The reversal of 13481399 is 99318431.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13481399 - 2⁴ = 13481383 is a prime.

Together with 13481401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13481309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6740699 + 6740700.

It is an arithmetic number, because the mean of its divisors is an integer number (6740700).

Almost surely, 2^13481399 is an apocalyptic number.

13481399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13481399 is an equidigital number, since it uses as much as digits as its factorization.

13481399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 13481399 is about 3671.7024661593. The cubic root of 13481399 is about 238.0007473554. Note that the first 3 decimals are identical.

The spelling of 13481399 in words is "thirteen million, four hundred eighty-one thousand, three hundred ninety-nine".