13973845 has 4 divisors (see below), whose sum is σ = 16768620. Its totient is φ = 11179072.

The previous prime is 13973837. The next prime is 13973887. The reversal of 13973845 is 54837931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3721041 + 10252804 = 1929^2 + 3202^2 .

It is a cyclic number.

It is not a de Polignac number, because 13973845 - 2³ = 13973837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13973798 and 13973807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1397380 + ... + 1397389.

It is an arithmetic number, because the mean of its divisors is an integer number (4192155).

Almost surely, 2^13973845 is an apocalyptic number.

It is an amenable number.

13973845 is a deficient number, since it is larger than the sum of its proper divisors (2794775).

13973845 is an equidigital number, since it uses as much as digits as its factorization.

13973845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794774.

The product of its digits is 90720, while the sum is 40.

The square root of 13973845 is about 3738.1606439531. The cubic root of 13973845 is about 240.8640441141.

It can be divided in two parts, 139 and 73845, that added together give a square (73984 = 272²).

The spelling of 13973845 in words is "thirteen million, nine hundred seventy-three thousand, eight hundred forty-five".