13621073 has 4 divisors (see below), whose sum is σ = 13669488. Its totient is φ = 13572660.

The previous prime is 13621051. The next prime is 13621087. The reversal of 13621073 is 37012631.

It is a happy number.

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 not a de Polignac number, because 13621073 - 2⁶ = 13621009 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 (13621373) 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, 23783 + ... + 24348.

It is an arithmetic number, because the mean of its divisors is an integer number (3417372).

Almost surely, 2^13621073 is an apocalyptic number.

It is an amenable number.

13621073 is a deficient number, since it is larger than the sum of its proper divisors (48415).

13621073 is an equidigital number, since it uses as much as digits as its factorization.

13621073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48414.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 13621073 is about 3690.6737867224. The cubic root of 13621073 is about 238.8198604074.

The spelling of 13621073 in words is "thirteen million, six hundred twenty-one thousand, seventy-three".