13243191387 has 16 divisors (see below), whose sum is σ = 18594408960. Its totient is φ = 8360757792.

The previous prime is 13243191383. The next prime is 13243191449. The reversal of 13243191387 is 78319134231.

It is not a de Polignac number, because 13243191387 - 2² = 13243191383 is a prime.

It is a super-2 number, since 2×13243191387² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13243191383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100318 + ... + 191180.

It is an arithmetic number, because the mean of its divisors is an integer number (1162150560).

Almost surely, 2^13243191387 is an apocalyptic number.

13243191387 is a deficient number, since it is larger than the sum of its proper divisors (5351217573).

13243191387 is a wasteful number, since it uses less digits than its factorization.

13243191387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93442.

The product of its digits is 108864, while the sum is 42.

The spelling of 13243191387 in words is "thirteen billion, two hundred forty-three million, one hundred ninety-one thousand, three hundred eighty-seven".