170981117 has 2 divisors, whose sum is σ = 170981118. Its totient is φ = 170981116.

The previous prime is 170981101. The next prime is 170981123. The reversal of 170981117 is 711189071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94750756 + 76230361 = 9734^2 + 8731^2 .

It is a cyclic number.

It is not a de Polignac number, because 170981117 - 2⁴ = 170981101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170981137) 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, 85490558 + 85490559.

It is an arithmetic number, because the mean of its divisors is an integer number (85490559).

Almost surely, 2^170981117 is an apocalyptic number.

It is an amenable number.

170981117 is a deficient number, since it is larger than the sum of its proper divisors (1).

170981117 is an equidigital number, since it uses as much as digits as its factorization.

170981117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 35.

The square root of 170981117 is about 13075.9748011382. The cubic root of 170981117 is about 555.0294787253.

The spelling of 170981117 in words is "one hundred seventy million, nine hundred eighty-one thousand, one hundred seventeen".