170787161 has 2 divisors, whose sum is σ = 170787162. Its totient is φ = 170787160.

The previous prime is 170787137. The next prime is 170787179. The reversal of 170787161 is 161787071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105678400 + 65108761 = 10280^2 + 8069^2 .

It is a cyclic number.

It is not a de Polignac number, because 170787161 - 2¹⁰ = 170786137 is a prime.

It is not a weakly prime, because it can be changed into another prime (170787361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85393580 + 85393581.

It is an arithmetic number, because the mean of its divisors is an integer number (85393581).

Almost surely, 2^170787161 is an apocalyptic number.

It is an amenable number.

170787161 is a deficient number, since it is larger than the sum of its proper divisors (1).

170787161 is an equidigital number, since it uses as much as digits as its factorization.

170787161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 38.

The square root of 170787161 is about 13068.5561941631. The cubic root of 170787161 is about 554.8195295593.

The spelling of 170787161 in words is "one hundred seventy million, seven hundred eighty-seven thousand, one hundred sixty-one".