13987073 has 12 divisors (see below), whose sum is σ = 15246252. Its totient is φ = 12787200.

The previous prime is 13987063. The next prime is 13987079. The reversal of 13987073 is 37078931.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7059649 + 6927424 = 2657^2 + 2632^2 .

It is not a de Polignac number, because 13987073 - 2¹² = 13982977 is a prime.

It is a super-2 number, since 2×13987073² = 391276422214658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13987079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22973 + ... + 23573.

It is an arithmetic number, because the mean of its divisors is an integer number (1270521).

Almost surely, 2^13987073 is an apocalyptic number.

It is an amenable number.

13987073 is a deficient number, since it is larger than the sum of its proper divisors (1259179).

13987073 is an equidigital number, since it uses as much as digits as its factorization.

13987073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 13987073 is about 3739.9295447909. The cubic root of 13987073 is about 240.9400228382.

The spelling of 13987073 in words is "thirteen million, nine hundred eighty-seven thousand, seventy-three".