13619969 has 4 divisors (see below), whose sum is σ = 14858160. Its totient is φ = 12381780.

The previous prime is 13619953. The next prime is 13619987. The reversal of 13619969 is 96991631.

It is a happy number.

13619969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13619969 - 2⁴ = 13619953 is a prime.

It is a super-2 number, since 2×13619969² = 371007111121922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13619069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619079 + ... + 619100.

It is an arithmetic number, because the mean of its divisors is an integer number (3714540).

Almost surely, 2^13619969 is an apocalyptic number.

It is an amenable number.

13619969 is a deficient number, since it is larger than the sum of its proper divisors (1238191).

13619969 is a wasteful number, since it uses less digits than its factorization.

13619969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238190.

The product of its digits is 78732, while the sum is 44.

The square root of 13619969 is about 3690.5242175062. The cubic root of 13619969 is about 238.8134080462.

The spelling of 13619969 in words is "thirteen million, six hundred nineteen thousand, nine hundred sixty-nine".