13987491075 has 120 divisors (see below), whose sum is σ = 26370550272. Its totient is φ = 7328724480.

The previous prime is 13987491073. The next prime is 13987491103. The reversal of 13987491075 is 57019478931.

It is a happy number.

13987491075 is a `hidden beast` number, since 1 + 3 + 9 + 87 + 491 + 0 + 75 = 666.

It is not a de Polignac number, because 13987491075 - 2¹ = 13987491073 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13987491073) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 35232777 + ... + 35233173.

Almost surely, 2^13987491075 is an apocalyptic number.

13987491075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13987491075 is a deficient number, since it is larger than the sum of its proper divisors (12383059197).

13987491075 is a wasteful number, since it uses less digits than its factorization.

13987491075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 13987491075 in words is "thirteen billion, nine hundred eighty-seven million, four hundred ninety-one thousand, seventy-five".