13459191491 has 4 divisors (see below), whose sum is σ = 13472221752. Its totient is φ = 13446161232.

The previous prime is 13459191469. The next prime is 13459191511. The reversal of 13459191491 is 19419195431.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13459191491 - 2¹⁸ = 13458929347 is a prime.

It is a super-2 number, since 2×13459191491² (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 (13459191191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6513581 + ... + 6515646.

It is an arithmetic number, because the mean of its divisors is an integer number (3368055438).

Almost surely, 2^13459191491 is an apocalyptic number.

13459191491 is a deficient number, since it is larger than the sum of its proper divisors (13030261).

13459191491 is a wasteful number, since it uses less digits than its factorization.

13459191491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13030260.

The product of its digits is 174960, while the sum is 47.

The spelling of 13459191491 in words is "thirteen billion, four hundred fifty-nine million, one hundred ninety-one thousand, four hundred ninety-one".