13921719 has 8 divisors (see below), whose sum is σ = 21214080. Its totient is φ = 7955256.

The previous prime is 13921717. The next prime is 13921727. The reversal of 13921719 is 91712931.

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

It is not a de Polignac number, because 13921719 - 2¹ = 13921717 is a prime.

It is a super-2 number, since 2×13921719² = 387628519829922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13921719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13921717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331449 + ... + 331490.

It is an arithmetic number, because the mean of its divisors is an integer number (2651760).

Almost surely, 2^13921719 is an apocalyptic number.

13921719 is a deficient number, since it is larger than the sum of its proper divisors (7292361).

13921719 is an equidigital number, since it uses as much as digits as its factorization.

13921719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662949.

The product of its digits is 3402, while the sum is 33.

The square root of 13921719 is about 3731.1819843047. The cubic root of 13921719 is about 240.5641762047.

The spelling of 13921719 in words is "thirteen million, nine hundred twenty-one thousand, seven hundred nineteen".