13719487 has 2 divisors, whose sum is σ = 13719488. Its totient is φ = 13719486.

The previous prime is 13719481. The next prime is 13719491. The reversal of 13719487 is 78491731.

It is a strong prime.

It is an emirp because it is prime and its reverse (78491731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13719487 - 2³ = 13719479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13719481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6859743 + 6859744.

It is an arithmetic number, because the mean of its divisors is an integer number (6859744).

Almost surely, 2^13719487 is an apocalyptic number.

13719487 is a deficient number, since it is larger than the sum of its proper divisors (1).

13719487 is an equidigital number, since it uses as much as digits as its factorization.

13719487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 40.

The square root of 13719487 is about 3703.9825863522. The cubic root of 13719487 is about 239.3936487640.

The spelling of 13719487 in words is "thirteen million, seven hundred nineteen thousand, four hundred eighty-seven".