13321943 has 4 divisors (see below), whose sum is σ = 13509648. Its totient is φ = 13134240.

The previous prime is 13321937. The next prime is 13321951. The reversal of 13321943 is 34912331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13321943 - 2⁴ = 13321927 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 (13321993) 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, 93746 + ... + 93887.

It is an arithmetic number, because the mean of its divisors is an integer number (3377412).

Almost surely, 2^13321943 is an apocalyptic number.

13321943 is a deficient number, since it is larger than the sum of its proper divisors (187705).

13321943 is an equidigital number, since it uses as much as digits as its factorization.

13321943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187704.

The product of its digits is 1944, while the sum is 26.

The square root of 13321943 is about 3649.9236978326. The cubic root of 13321943 is about 237.0586773950.

The spelling of 13321943 in words is "thirteen million, three hundred twenty-one thousand, nine hundred forty-three".