13987417993 has 4 divisors (see below), whose sum is σ = 13989161680. Its totient is φ = 13985674308.

The previous prime is 13987417949. The next prime is 13987418057. The reversal of 13987417993 is 39971478931.

13987417993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13987417993 - 2²⁹ = 13450547081 is a prime.

It is a super-2 number, since 2×13987417993² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13987417933) 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 3 ways as a sum of consecutive naturals, for example, 859755 + ... + 875872.

It is an arithmetic number, because the mean of its divisors is an integer number (3497290420).

Almost surely, 2^13987417993 is an apocalyptic number.

It is an amenable number.

13987417993 is a deficient number, since it is larger than the sum of its proper divisors (1743687).

13987417993 is an equidigital number, since it uses as much as digits as its factorization.

13987417993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743686.

The product of its digits is 10287648, while the sum is 61.

The spelling of 13987417993 in words is "thirteen billion, nine hundred eighty-seven million, four hundred seventeen thousand, nine hundred ninety-three".