131930809897 has 2 divisors, whose sum is σ = 131930809898. Its totient is φ = 131930809896.

The previous prime is 131930809853. The next prime is 131930809919. The reversal of 131930809897 is 798908039131.

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., 83352886681 + 48577923216 = 288709^2 + 220404^2 .

It is a cyclic number.

It is not a de Polignac number, because 131930809897 - 2¹⁵ = 131930777129 is a prime.

It is not a weakly prime, because it can be changed into another prime (131930809837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65965404948 + 65965404949.

It is an arithmetic number, because the mean of its divisors is an integer number (65965404949).

Almost surely, 2^131930809897 is an apocalyptic number.

It is an amenable number.

131930809897 is a deficient number, since it is larger than the sum of its proper divisors (1).

131930809897 is an equidigital number, since it uses as much as digits as its factorization.

131930809897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 58.

The spelling of 131930809897 in words is "one hundred thirty-one billion, nine hundred thirty million, eight hundred nine thousand, eight hundred ninety-seven".