13973213 has 4 divisors (see below), whose sum is σ = 14580768. Its totient is φ = 13365660.

The previous prime is 13973203. The next prime is 13973221. The reversal of 13973213 is 31237931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13973213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13973203) 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, 303743 + ... + 303788.

It is an arithmetic number, because the mean of its divisors is an integer number (3645192).

Almost surely, 2^13973213 is an apocalyptic number.

It is an amenable number.

13973213 is a deficient number, since it is larger than the sum of its proper divisors (607555).

13973213 is an equidigital number, since it uses as much as digits as its factorization.

13973213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607554.

The product of its digits is 3402, while the sum is 29.

The square root of 13973213 is about 3738.0761094445. The cubic root of 13973213 is about 240.8604128451.

The spelling of 13973213 in words is "thirteen million, nine hundred seventy-three thousand, two hundred thirteen".