131442197 has 2 divisors, whose sum is σ = 131442198. Its totient is φ = 131442196.

The previous prime is 131442191. The next prime is 131442253. The reversal of 131442197 is 791244131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102292996 + 29149201 = 10114^2 + 5399^2 .

It is an emirp because it is prime and its reverse (791244131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131442197 - 2²² = 127247893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131442191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65721098 + 65721099.

It is an arithmetic number, because the mean of its divisors is an integer number (65721099).

Almost surely, 2^131442197 is an apocalyptic number.

It is an amenable number.

131442197 is a deficient number, since it is larger than the sum of its proper divisors (1).

131442197 is an equidigital number, since it uses as much as digits as its factorization.

131442197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 131442197 is about 11464.8243335866. The cubic root of 131442197 is about 508.4461187945.

The spelling of 131442197 in words is "one hundred thirty-one million, four hundred forty-two thousand, one hundred ninety-seven".