131966207999 has 4 divisors (see below), whose sum is σ = 134129588520. Its totient is φ = 129802827480.

The previous prime is 131966207993. The next prime is 131966208061. The reversal of 131966207999 is 999702669131.

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 131966207999 - 2⁸ = 131966207743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131966207993) 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, 1081690169 + ... + 1081690290.

It is an arithmetic number, because the mean of its divisors is an integer number (33532397130).

Almost surely, 2^131966207999 is an apocalyptic number.

131966207999 is a deficient number, since it is larger than the sum of its proper divisors (2163380521).

131966207999 is an equidigital number, since it uses as much as digits as its factorization.

131966207999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163380520.

The product of its (nonzero) digits is 9920232, while the sum is 62.

The spelling of 131966207999 in words is "one hundred thirty-one billion, nine hundred sixty-six million, two hundred seven thousand, nine hundred ninety-nine".