13719689 has 2 divisors, whose sum is σ = 13719690. Its totient is φ = 13719688.

The previous prime is 13719679. The next prime is 13719733. The reversal of 13719689 is 98691731.

It is an a-pointer prime, because the next prime (13719733) can be obtained adding 13719689 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 795664 = 3595^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 13719689 - 2¹² = 13715593 is a prime.

It is not a weakly prime, because it can be changed into another prime (13719649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6859844 + 6859845.

It is an arithmetic number, because the mean of its divisors is an integer number (6859845).

Almost surely, 2^13719689 is an apocalyptic number.

It is an amenable number.

13719689 is a deficient number, since it is larger than the sum of its proper divisors (1).

13719689 is an equidigital number, since it uses as much as digits as its factorization.

13719689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 13719689 is about 3704.0098541986. The cubic root of 13719689 is about 239.3948236690.

The spelling of 13719689 in words is "thirteen million, seven hundred nineteen thousand, six hundred eighty-nine".