13970321 has 4 divisors (see below), whose sum is σ = 14022144. Its totient is φ = 13918500.

The previous prime is 13970309. The next prime is 13970347. The reversal of 13970321 is 12307931.

13970321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12307931 = 59 ⋅208609.

It is a cyclic number.

It is not a de Polignac number, because 13970321 - 2¹⁰ = 13969297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13970221) 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, 25505 + ... + 26046.

It is an arithmetic number, because the mean of its divisors is an integer number (3505536).

Almost surely, 2^13970321 is an apocalyptic number.

It is an amenable number.

13970321 is a deficient number, since it is larger than the sum of its proper divisors (51823).

13970321 is an equidigital number, since it uses as much as digits as its factorization.

13970321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51822.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 13970321 is about 3737.6892594222. The cubic root of 13970321 is about 240.8437949450.

The spelling of 13970321 in words is "thirteen million, nine hundred seventy thousand, three hundred twenty-one".