8127591349 has 4 divisors (see below), whose sum is σ = 8127773280. Its totient is φ = 8127409420.

The previous prime is 8127591343. The next prime is 8127591371. The reversal of 8127591349 is 9431957218.

It is a happy number.

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 8127591349 - 2³ = 8127591341 is a prime.

It is a super-2 number, since 2×8127591349² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8127591341) 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, 27294 + ... + 130384.

It is an arithmetic number, because the mean of its divisors is an integer number (2031943320).

Almost surely, 2^8127591349 is an apocalyptic number.

It is an amenable number.

8127591349 is a deficient number, since it is larger than the sum of its proper divisors (181931).

8127591349 is a wasteful number, since it uses less digits than its factorization.

8127591349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181930.

The product of its digits is 544320, while the sum is 49.

The square root of 8127591349 is about 90153.1549586591. The cubic root of 8127591349 is about 2010.5765817806.

The spelling of 8127591349 in words is "eight billion, one hundred twenty-seven million, five hundred ninety-one thousand, three hundred forty-nine".