131791921089 has 4 divisors (see below), whose sum is σ = 175722561456. Its totient is φ = 87861280724.

The previous prime is 131791921067. The next prime is 131791921091. The reversal of 131791921089 is 980129197131.

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 131791921089 - 2⁷ = 131791920961 is a prime.

It is a super-2 number, since 2×131791921089² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131791921049) 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, 21965320179 + ... + 21965320184.

It is an arithmetic number, because the mean of its divisors is an integer number (43930640364).

Almost surely, 2^131791921089 is an apocalyptic number.

It is an amenable number.

131791921089 is a deficient number, since it is larger than the sum of its proper divisors (43930640367).

131791921089 is an equidigital number, since it uses as much as digits as its factorization.

131791921089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43930640366.

The product of its (nonzero) digits is 244944, while the sum is 51.

The spelling of 131791921089 in words is "one hundred thirty-one billion, seven hundred ninety-one million, nine hundred twenty-one thousand, eighty-nine".