13940219 has 4 divisors (see below), whose sum is σ = 14203296. Its totient is φ = 13677144.

The previous prime is 13940209. The next prime is 13940237. The reversal of 13940219 is 91204931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91204931 = 257 ⋅354883.

It is a cyclic number.

It is not a de Polignac number, because 13940219 - 2⁴ = 13940203 is a prime.

It is a super-2 number, since 2×13940219² = 388659411535922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 13940191 and 13940200.

It is not an unprimeable number, because it can be changed into a prime (13940209) 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, 131459 + ... + 131564.

It is an arithmetic number, because the mean of its divisors is an integer number (3550824).

Almost surely, 2^13940219 is an apocalyptic number.

13940219 is a deficient number, since it is larger than the sum of its proper divisors (263077).

13940219 is an equidigital number, since it uses as much as digits as its factorization.

13940219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263076.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 13940219 is about 3733.6602684229. The cubic root of 13940219 is about 240.6706876535.

The spelling of 13940219 in words is "thirteen million, nine hundred forty thousand, two hundred nineteen".