131791147 has 2 divisors, whose sum is σ = 131791148. Its totient is φ = 131791146.

The previous prime is 131791067. The next prime is 131791159. The reversal of 131791147 is 741197131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (741197131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131791147 is a prime.

It is not a weakly prime, because it can be changed into another prime (131701147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65895573 + 65895574.

It is an arithmetic number, because the mean of its divisors is an integer number (65895574).

Almost surely, 2^131791147 is an apocalyptic number.

131791147 is a deficient number, since it is larger than the sum of its proper divisors (1).

131791147 is an equidigital number, since it uses as much as digits as its factorization.

131791147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 34.

The square root of 131791147 is about 11480.0325347971. The cubic root of 131791147 is about 508.8956585990.

The spelling of 131791147 in words is "one hundred thirty-one million, seven hundred ninety-one thousand, one hundred forty-seven".