131240393 has 2 divisors, whose sum is σ = 131240394. Its totient is φ = 131240392.

The previous prime is 131240377. The next prime is 131240407. The reversal of 131240393 is 393042131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114854089 + 16386304 = 10717^2 + 4048^2 .

It is a cyclic number.

It is not a de Polignac number, because 131240393 - 2⁴ = 131240377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (131240293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65620196 + 65620197.

It is an arithmetic number, because the mean of its divisors is an integer number (65620197).

Almost surely, 2^131240393 is an apocalyptic number.

It is an amenable number.

131240393 is a deficient number, since it is larger than the sum of its proper divisors (1).

131240393 is an equidigital number, since it uses as much as digits as its factorization.

131240393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 131240393 is about 11456.0199458625. The cubic root of 131240393 is about 508.1857787147.

The spelling of 131240393 in words is "one hundred thirty-one million, two hundred forty thousand, three hundred ninety-three".