131268769 has 2 divisors, whose sum is σ = 131268770. Its totient is φ = 131268768.

The previous prime is 131268737. The next prime is 131268773. The reversal of 131268769 is 967862131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90155025 + 41113744 = 9495^2 + 6412^2 .

It is a cyclic number.

It is not a de Polignac number, because 131268769 - 2⁵ = 131268737 is a prime.

It is a super-2 number, since 2×131268769² = 34462979429550722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131268719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65634384 + 65634385.

It is an arithmetic number, because the mean of its divisors is an integer number (65634385).

Almost surely, 2^131268769 is an apocalyptic number.

It is an amenable number.

131268769 is a deficient number, since it is larger than the sum of its proper divisors (1).

131268769 is an equidigital number, since it uses as much as digits as its factorization.

131268769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 131268769 is about 11457.2583544232. The cubic root of 131268769 is about 508.2224016886. Note that the first 3 decimals are identical.

The spelling of 131268769 in words is "one hundred thirty-one million, two hundred sixty-eight thousand, seven hundred sixty-nine".