131040109 has 2 divisors, whose sum is σ = 131040110. Its totient is φ = 131040108.

The previous prime is 131040079. The next prime is 131040149. The reversal of 131040109 is 901040131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118330884 + 12709225 = 10878^2 + 3565^2 .

It is a cyclic number.

It is not a de Polignac number, because 131040109 - 2⁷ = 131039981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131040149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65520054 + 65520055.

It is an arithmetic number, because the mean of its divisors is an integer number (65520055).

Almost surely, 2^131040109 is an apocalyptic number.

It is an amenable number.

131040109 is a deficient number, since it is larger than the sum of its proper divisors (1).

131040109 is an equidigital number, since it uses as much as digits as its factorization.

131040109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 131040109 is about 11447.2751779627. The cubic root of 131040109 is about 507.9271355285.

The spelling of 131040109 in words is "one hundred thirty-one million, forty thousand, one hundred nine".