13719649 has 2 divisors, whose sum is σ = 13719650. Its totient is φ = 13719648.

The previous prime is 13719631. The next prime is 13719659. The reversal of 13719649 is 94691731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12909649 + 810000 = 3593^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 13719649 - 2¹⁹ = 13195361 is a prime.

It is not a weakly prime, because it can be changed into another prime (13719659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6859824 + 6859825.

It is an arithmetic number, because the mean of its divisors is an integer number (6859825).

Almost surely, 2^13719649 is an apocalyptic number.

It is an amenable number.

13719649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13719649 is an equidigital number, since it uses as much as digits as its factorization.

13719649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 13719649 is about 3704.0044546409. The cubic root of 13719649 is about 239.3945910154.

The spelling of 13719649 in words is "thirteen million, seven hundred nineteen thousand, six hundred forty-nine".