131288293 has 2 divisors, whose sum is σ = 131288294. Its totient is φ = 131288292.

The previous prime is 131288291. The next prime is 131288299. The reversal of 131288293 is 392882131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88228449 + 43059844 = 9393^2 + 6562^2 .

It is a cyclic number.

It is not a de Polignac number, because 131288293 - 2¹ = 131288291 is a prime.

Together with 131288291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131288291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65644146 + 65644147.

It is an arithmetic number, because the mean of its divisors is an integer number (65644147).

Almost surely, 2^131288293 is an apocalyptic number.

It is an amenable number.

131288293 is a deficient number, since it is larger than the sum of its proper divisors (1).

131288293 is an equidigital number, since it uses as much as digits as its factorization.

131288293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 37.

The square root of 131288293 is about 11458.1103590426. The cubic root of 131288293 is about 508.2475969232.

The spelling of 131288293 in words is "one hundred thirty-one million, two hundred eighty-eight thousand, two hundred ninety-three".