13987474 has 4 divisors (see below), whose sum is σ = 20981214. Its totient is φ = 6993736.

The previous prime is 13987459. The next prime is 13987487. The reversal of 13987474 is 47478931.

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

It can be written as a sum of positive squares in only one way, i.e., 13950225 + 37249 = 3735^2 + 193^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13987474.

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 as a sum of consecutive naturals, namely, 3496867 + ... + 3496870.

Almost surely, 2^13987474 is an apocalyptic number.

13987474 is a deficient number, since it is larger than the sum of its proper divisors (6993740).

13987474 is an equidigital number, since it uses as much as digits as its factorization.

13987474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993739.

The product of its digits is 169344, while the sum is 43.

The square root of 13987474 is about 3739.9831550423. The cubic root of 13987474 is about 240.9423253458.

The spelling of 13987474 in words is "thirteen million, nine hundred eighty-seven thousand, four hundred seventy-four".