131320169 has 2 divisors, whose sum is σ = 131320170. Its totient is φ = 131320168.

The previous prime is 131320139. The next prime is 131320183. The reversal of 131320169 is 961023131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112614544 + 18705625 = 10612^2 + 4325^2 .

It is a cyclic number.

It is not a de Polignac number, because 131320169 - 2⁸ = 131319913 is a prime.

It is a super-2 number, since 2×131320169² = 34489973572377122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131320139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65660084 + 65660085.

It is an arithmetic number, because the mean of its divisors is an integer number (65660085).

Almost surely, 2^131320169 is an apocalyptic number.

It is an amenable number.

131320169 is a deficient number, since it is larger than the sum of its proper divisors (1).

131320169 is an equidigital number, since it uses as much as digits as its factorization.

131320169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 131320169 is about 11459.5012544177. The cubic root of 131320169 is about 508.2887267377.

The spelling of 131320169 in words is "one hundred thirty-one million, three hundred twenty thousand, one hundred sixty-nine".