8131491929 has 8 divisors (see below), whose sum is σ = 8873100288. Its totient is φ = 7390280560.

The previous prime is 8131491919. The next prime is 8131491937. The reversal of 8131491929 is 9291941318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8131491929 - 2⁴ = 8131491913 is a prime.

It is a super-2 number, since 2×8131491929² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8131491919) 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 7 ways as a sum of consecutive naturals, for example, 55577 + ... + 139110.

It is an arithmetic number, because the mean of its divisors is an integer number (1109137536).

Almost surely, 2^8131491929 is an apocalyptic number.

It is an amenable number.

8131491929 is a deficient number, since it is larger than the sum of its proper divisors (741608359).

8131491929 is a wasteful number, since it uses less digits than its factorization.

8131491929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198495.

The product of its digits is 139968, while the sum is 47.

The square root of 8131491929 is about 90174.7854391681. The cubic root of 8131491929 is about 2010.8981678540.

The spelling of 8131491929 in words is "eight billion, one hundred thirty-one million, four hundred ninety-one thousand, nine hundred twenty-nine".