131293609 has 2 divisors, whose sum is σ = 131293610. Its totient is φ = 131293608.

The previous prime is 131293583. The next prime is 131293619. The reversal of 131293609 is 906392131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95257600 + 36036009 = 9760^2 + 6003^2 .

It is a cyclic number.

It is not a de Polignac number, because 131293609 - 2¹³ = 131285417 is a prime.

It is not a weakly prime, because it can be changed into another prime (131293619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65646804 + 65646805.

It is an arithmetic number, because the mean of its divisors is an integer number (65646805).

Almost surely, 2^131293609 is an apocalyptic number.

It is an amenable number.

131293609 is a deficient number, since it is larger than the sum of its proper divisors (1).

131293609 is an equidigital number, since it uses as much as digits as its factorization.

131293609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 131293609 is about 11458.3423321177. The cubic root of 131293609 is about 508.2544566558.

The spelling of 131293609 in words is "one hundred thirty-one million, two hundred ninety-three thousand, six hundred nine".