131178017 has 2 divisors, whose sum is σ = 131178018. Its totient is φ = 131178016.

The previous prime is 131177989. The next prime is 131178031. The reversal of 131178017 is 710871131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66520336 + 64657681 = 8156^2 + 8041^2 .

It is a cyclic number.

It is not a de Polignac number, because 131178017 - 2¹⁰ = 131176993 is a prime.

It is not a weakly prime, because it can be changed into another prime (131178217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65589008 + 65589009.

It is an arithmetic number, because the mean of its divisors is an integer number (65589009).

Almost surely, 2^131178017 is an apocalyptic number.

It is an amenable number.

131178017 is a deficient number, since it is larger than the sum of its proper divisors (1).

131178017 is an equidigital number, since it uses as much as digits as its factorization.

131178017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 29.

The square root of 131178017 is about 11453.2972108472. The cubic root of 131178017 is about 508.1052556921.

The spelling of 131178017 in words is "one hundred thirty-one million, one hundred seventy-eight thousand, seventeen".