13721419 has 2 divisors, whose sum is σ = 13721420. Its totient is φ = 13721418.

The previous prime is 13721381. The next prime is 13721423. The reversal of 13721419 is 91412731.

13721419 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (91412731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13721419 - 2⁷ = 13721291 is a prime.

It is a super-2 number, since 2×13721419² = 376554678747122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13721459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6860709 + 6860710.

It is an arithmetic number, because the mean of its divisors is an integer number (6860710).

Almost surely, 2^13721419 is an apocalyptic number.

13721419 is a deficient number, since it is larger than the sum of its proper divisors (1).

13721419 is an equidigital number, since it uses as much as digits as its factorization.

13721419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 28.

The square root of 13721419 is about 3704.2433775334. The cubic root of 13721419 is about 239.4048855015.

The spelling of 13721419 in words is "thirteen million, seven hundred twenty-one thousand, four hundred nineteen".