13921019 has 8 divisors (see below), whose sum is σ = 15971040. Its totient is φ = 11886336.

The previous prime is 13921013. The next prime is 13921031. The reversal of 13921019 is 91012931.

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

It is a de Polignac number, because none of the positive numbers 2^k-13921019 is a prime.

It is a super-2 number, since 2×13921019² = 387589539996722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13921013) 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, 1814 + ... + 5579.

It is an arithmetic number, because the mean of its divisors is an integer number (1996380).

Almost surely, 2^13921019 is an apocalyptic number.

13921019 is a deficient number, since it is larger than the sum of its proper divisors (2050021).

13921019 is an equidigital number, since it uses as much as digits as its factorization.

13921019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7669.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 13921019 is about 3731.0881790706. The cubic root of 13921019 is about 240.5601441896.

The spelling of 13921019 in words is "thirteen million, nine hundred twenty-one thousand, nineteen".