131266397 has 2 divisors, whose sum is σ = 131266398. Its totient is φ = 131266396.

The previous prime is 131266391. The next prime is 131266403. The reversal of 131266397 is 793662131.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (131266391) and next prime (131266403).

It can be written as a sum of positive squares in only one way, i.e., 111809476 + 19456921 = 10574^2 + 4411^2 .

It is an emirp because it is prime and its reverse (793662131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131266397 - 2⁴ = 131266381 is a prime.

It is a Chen prime.

It is equal to p_7445972 and since 131266397 and 7445972 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131266397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131266391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65633198 + 65633199.

It is an arithmetic number, because the mean of its divisors is an integer number (65633199).

Almost surely, 2^131266397 is an apocalyptic number.

It is an amenable number.

131266397 is a deficient number, since it is larger than the sum of its proper divisors (1).

131266397 is an equidigital number, since it uses as much as digits as its factorization.

131266397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 131266397 is about 11457.1548387896. The cubic root of 131266397 is about 508.2193405117.

The spelling of 131266397 in words is "one hundred thirty-one million, two hundred sixty-six thousand, three hundred ninety-seven".