131391829673 has 4 divisors (see below), whose sum is σ = 141498893508. Its totient is φ = 121284765840.

The previous prime is 131391829651. The next prime is 131391829687. The reversal of 131391829673 is 376928193131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30682076569 + 100709753104 = 175163^2 + 317348^2 .

It is a cyclic number.

It is not a de Polignac number, because 131391829673 - 2⁶ = 131391829609 is a prime.

It is a super-3 number, since 3×131391829673³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131391829603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5053531898 + ... + 5053531923.

It is an arithmetic number, because the mean of its divisors is an integer number (35374723377).

Almost surely, 2^131391829673 is an apocalyptic number.

131391829673 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131391829673 is a deficient number, since it is larger than the sum of its proper divisors (10107063835).

131391829673 is a wasteful number, since it uses less digits than its factorization.

131391829673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10107063834.

The product of its digits is 1469664, while the sum is 53.

The spelling of 131391829673 in words is "one hundred thirty-one billion, three hundred ninety-one million, eight hundred twenty-nine thousand, six hundred seventy-three".