131991382723 has 2 divisors, whose sum is σ = 131991382724. Its totient is φ = 131991382722.

The previous prime is 131991382603. The next prime is 131991382751. The reversal of 131991382723 is 327283199131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131991382723 is a prime.

It is a super-2 number, since 2×131991382723² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131991482723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65995691361 + 65995691362.

It is an arithmetic number, because the mean of its divisors is an integer number (65995691362).

Almost surely, 2^131991382723 is an apocalyptic number.

131991382723 is a deficient number, since it is larger than the sum of its proper divisors (1).

131991382723 is an equidigital number, since it uses as much as digits as its factorization.

131991382723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The spelling of 131991382723 in words is "one hundred thirty-one billion, nine hundred ninety-one million, three hundred eighty-two thousand, seven hundred twenty-three".