13487997 has 8 divisors (see below), whose sum is σ = 18007456. Its totient is φ = 8980272.

The previous prime is 13487993. The next prime is 13488001. The reversal of 13487997 is 79978431.

It is an interprime number because it is at equal distance from previous prime (13487993) and next prime (13488001).

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

It is not a de Polignac number, because 13487997 - 2² = 13487993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13487993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243 + ... + 5199.

It is an arithmetic number, because the mean of its divisors is an integer number (2250932).

Almost surely, 2^13487997 is an apocalyptic number.

It is an amenable number.

13487997 is a deficient number, since it is larger than the sum of its proper divisors (4519459).

13487997 is an equidigital number, since it uses as much as digits as its factorization.

13487997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867.

The product of its digits is 381024, while the sum is 48.

The square root of 13487997 is about 3672.6008495343. The cubic root of 13487997 is about 238.0395680747.

The spelling of 13487997 in words is "thirteen million, four hundred eighty-seven thousand, nine hundred ninety-seven".