131291723 has 2 divisors, whose sum is σ = 131291724. Its totient is φ = 131291722.

The previous prime is 131291707. The next prime is 131291747. The reversal of 131291723 is 327192131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131291723 - 2⁴ = 131291707 is a prime.

It is not a weakly prime, because it can be changed into another prime (131291753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65645861 + 65645862.

It is an arithmetic number, because the mean of its divisors is an integer number (65645862).

Almost surely, 2^131291723 is an apocalyptic number.

131291723 is a deficient number, since it is larger than the sum of its proper divisors (1).

131291723 is an equidigital number, since it uses as much as digits as its factorization.

131291723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 131291723 is about 11458.2600337049. The cubic root of 131291723 is about 508.2520229946.

The spelling of 131291723 in words is "one hundred thirty-one million, two hundred ninety-one thousand, seven hundred twenty-three".