131394941669 has 2 divisors, whose sum is σ = 131394941670. Its totient is φ = 131394941668.

The previous prime is 131394941647. The next prime is 131394941681. The reversal of 131394941669 is 966149493131.

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., 75769719169 + 55625222500 = 275263^2 + 235850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131394941669 is a prime.

It is a super-2 number, since 2×131394941669² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131394941869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65697470834 + 65697470835.

It is an arithmetic number, because the mean of its divisors is an integer number (65697470835).

Almost surely, 2^131394941669 is an apocalyptic number.

It is an amenable number.

131394941669 is a deficient number, since it is larger than the sum of its proper divisors (1).

131394941669 is an equidigital number, since it uses as much as digits as its factorization.

131394941669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 56.

The spelling of 131394941669 in words is "one hundred thirty-one billion, three hundred ninety-four million, nine hundred forty-one thousand, six hundred sixty-nine".