13987273 has 8 divisors (see below), whose sum is σ = 14381640. Its totient is φ = 13595520.

The previous prime is 13987271. The next prime is 13987291. The reversal of 13987273 is 37278931.

It can be written as a sum of positive squares in 4 ways, for example, as 356409 + 13630864 = 597^2 + 3692^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13987273 - 2¹ = 13987271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13987271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15511 + ... + 16387.

It is an arithmetic number, because the mean of its divisors is an integer number (1797705).

Almost surely, 2^13987273 is an apocalyptic number.

It is an amenable number.

13987273 is a deficient number, since it is larger than the sum of its proper divisors (394367).

13987273 is an equidigital number, since it uses as much as digits as its factorization.

13987273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307.

The product of its digits is 63504, while the sum is 40.

The square root of 13987273 is about 3739.9562831670. The cubic root of 13987273 is about 240.9411712265.

The spelling of 13987273 in words is "thirteen million, nine hundred eighty-seven thousand, two hundred seventy-three".