131418869 has 2 divisors, whose sum is σ = 131418870. Its totient is φ = 131418868.

The previous prime is 131418841. The next prime is 131418943. The reversal of 131418869 is 968814131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75916369 + 55502500 = 8713^2 + 7450^2 .

It is an emirp because it is prime and its reverse (968814131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131418869 - 2⁸ = 131418613 is a prime.

It is a super-2 number, since 2×131418869² = 34541838258478322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen 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 (131418569) 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, 65709434 + 65709435.

It is an arithmetic number, because the mean of its divisors is an integer number (65709435).

Almost surely, 2^131418869 is an apocalyptic number.

It is an amenable number.

131418869 is a deficient number, since it is larger than the sum of its proper divisors (1).

131418869 is an equidigital number, since it uses as much as digits as its factorization.

131418869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 131418869 is about 11463.8069156803. The cubic root of 131418869 is about 508.4160378081.

The spelling of 131418869 in words is "one hundred thirty-one million, four hundred eighteen thousand, eight hundred sixty-nine".