13921213 has 8 divisors (see below), whose sum is σ = 14364000. Its totient is φ = 13482000.

The previous prime is 13921211. The next prime is 13921217. The reversal of 13921213 is 31212931.

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 13921213 - 2¹ = 13921211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13921211) 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, 8538 + ... + 10036.

It is an arithmetic number, because the mean of its divisors is an integer number (1795500).

Almost surely, 2^13921213 is an apocalyptic number.

It is an amenable number.

13921213 is a deficient number, since it is larger than the sum of its proper divisors (442787).

13921213 is a wasteful number, since it uses less digits than its factorization.

13921213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787.

The product of its digits is 324, while the sum is 22.

The square root of 13921213 is about 3731.1141767574. The cubic root of 13921213 is about 240.5612616473.

The spelling of 13921213 in words is "thirteen million, nine hundred twenty-one thousand, two hundred thirteen".