170994389 has 2 divisors, whose sum is σ = 170994390. Its totient is φ = 170994388.

The previous prime is 170994379. The next prime is 170994403. The reversal of 170994389 is 983499071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170511364 + 483025 = 13058^2 + 695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170994389 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 (170994379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85497194 + 85497195.

It is an arithmetic number, because the mean of its divisors is an integer number (85497195).

Almost surely, 2^170994389 is an apocalyptic number.

It is an amenable number.

170994389 is a deficient number, since it is larger than the sum of its proper divisors (1).

170994389 is an equidigital number, since it uses as much as digits as its factorization.

170994389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 170994389 is about 13076.4822869149. The cubic root of 170994389 is about 555.0438392987.

The spelling of 170994389 in words is "one hundred seventy million, nine hundred ninety-four thousand, three hundred eighty-nine".