131258069 has 2 divisors, whose sum is σ = 131258070. Its totient is φ = 131258068.

The previous prime is 131258063. The next prime is 131258081. The reversal of 131258069 is 960852131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106357969 + 24900100 = 10313^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 131258069 - 2⁴ = 131258053 is a prime.

It is a super-2 number, since 2×131258069² = 34457361355217522, which contains 22 as substring.

It is a Sophie Germain 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 (131258063) 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, 65629034 + 65629035.

It is an arithmetic number, because the mean of its divisors is an integer number (65629035).

Almost surely, 2^131258069 is an apocalyptic number.

It is an amenable number.

131258069 is a deficient number, since it is larger than the sum of its proper divisors (1).

131258069 is an equidigital number, since it uses as much as digits as its factorization.

131258069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 131258069 is about 11456.7913920085. The cubic root of 131258069 is about 508.2085925460.

The spelling of 131258069 in words is "one hundred thirty-one million, two hundred fifty-eight thousand, sixty-nine".