131961208807 has 2 divisors, whose sum is σ = 131961208808. Its totient is φ = 131961208806.

The previous prime is 131961208777. The next prime is 131961208879. The reversal of 131961208807 is 708802169131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131961208807 - 2²³ = 131952820199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131964208807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65980604403 + 65980604404.

It is an arithmetic number, because the mean of its divisors is an integer number (65980604404).

Almost surely, 2^131961208807 is an apocalyptic number.

131961208807 is a deficient number, since it is larger than the sum of its proper divisors (1).

131961208807 is an equidigital number, since it uses as much as digits as its factorization.

131961208807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 131961208807 in words is "one hundred thirty-one billion, nine hundred sixty-one million, two hundred eight thousand, eight hundred seven".