131678293 has 2 divisors, whose sum is σ = 131678294. Its totient is φ = 131678292.

The previous prime is 131678291. The next prime is 131678329. The reversal of 131678293 is 392876131.

Together with next prime (131678329) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119968209 + 11710084 = 10953^2 + 3422^2 .

It is an emirp because it is prime and its reverse (392876131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131678293 - 2¹ = 131678291 is a prime.

Together with 131678291, 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 (131678291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65839146 + 65839147.

It is an arithmetic number, because the mean of its divisors is an integer number (65839147).

Almost surely, 2^131678293 is an apocalyptic number.

It is an amenable number.

131678293 is a deficient number, since it is larger than the sum of its proper divisors (1).

131678293 is an equidigital number, since it uses as much as digits as its factorization.

131678293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 131678293 is about 11475.1162521344. The cubic root of 131678293 is about 508.7503597363.

The spelling of 131678293 in words is "one hundred thirty-one million, six hundred seventy-eight thousand, two hundred ninety-three".