13985399 has 2 divisors, whose sum is σ = 13985400. Its totient is φ = 13985398.

The previous prime is 13985381. The next prime is 13985431. The reversal of 13985399 is 99358931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13985399 - 2⁸ = 13985143 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13981399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6992699 + 6992700.

It is an arithmetic number, because the mean of its divisors is an integer number (6992700).

Almost surely, 2^13985399 is an apocalyptic number.

13985399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13985399 is an equidigital number, since it uses as much as digits as its factorization.

13985399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 47.

The square root of 13985399 is about 3739.7057370868. The cubic root of 13985399 is about 240.9304103984.

The spelling of 13985399 in words is "thirteen million, nine hundred eighty-five thousand, three hundred ninety-nine".