131766617 has 2 divisors, whose sum is σ = 131766618. Its totient is φ = 131766616.

The previous prime is 131766601. The next prime is 131766629. The reversal of 131766617 is 716667131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85581001 + 46185616 = 9251^2 + 6796^2 .

It is a cyclic number.

It is not a de Polignac number, because 131766617 - 2⁴ = 131766601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131786617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65883308 + 65883309.

It is an arithmetic number, because the mean of its divisors is an integer number (65883309).

Almost surely, 2^131766617 is an apocalyptic number.

It is an amenable number.

131766617 is a deficient number, since it is larger than the sum of its proper divisors (1).

131766617 is an equidigital number, since it uses as much as digits as its factorization.

131766617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 131766617 is about 11478.9641083157. The cubic root of 131766617 is about 508.8640834253.

The spelling of 131766617 in words is "one hundred thirty-one million, seven hundred sixty-six thousand, six hundred seventeen".