13961399 has 2 divisors, whose sum is σ = 13961400. Its totient is φ = 13961398.

The previous prime is 13961359. The next prime is 13961401. The reversal of 13961399 is 99316931.

13961399 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 is a cyclic number.

It is not a de Polignac number, because 13961399 - 2¹² = 13957303 is a prime.

Together with 13961401, 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 (13961329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6980699 + 6980700.

It is an arithmetic number, because the mean of its divisors is an integer number (6980700).

Almost surely, 2^13961399 is an apocalyptic number.

13961399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13961399 is an equidigital number, since it uses as much as digits as its factorization.

13961399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39366, while the sum is 41.

The square root of 13961399 is about 3736.4955506464. The cubic root of 13961399 is about 240.7925132329.

The spelling of 13961399 in words is "thirteen million, nine hundred sixty-one thousand, three hundred ninety-nine".