13219919 has 8 divisors (see below), whose sum is σ = 13708800. Its totient is φ = 12735000.

The previous prime is 13219909. The next prime is 13219933. The reversal of 13219919 is 91991231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13219919 - 2⁴ = 13219903 is a prime.

It is a super-2 number, since 2×13219919² = 349532516733122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13219909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6932 + ... + 8630.

It is an arithmetic number, because the mean of its divisors is an integer number (1713600).

Almost surely, 2^13219919 is an apocalyptic number.

13219919 is a deficient number, since it is larger than the sum of its proper divisors (488881).

13219919 is a wasteful number, since it uses less digits than its factorization.

13219919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981.

The product of its digits is 4374, while the sum is 35.

The square root of 13219919 is about 3635.9206536997. The cubic root of 13219919 is about 236.4519671161.

The spelling of 13219919 in words is "thirteen million, two hundred nineteen thousand, nine hundred nineteen".