170897849 has 2 divisors, whose sum is σ = 170897850. Its totient is φ = 170897848.

The previous prime is 170897827. The next prime is 170897851. The reversal of 170897849 is 948798071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117505600 + 53392249 = 10840^2 + 7307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170897849 is a prime.

Together with 170897851, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 170897849.

It is not a weakly prime, because it can be changed into another prime (170897869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85448924 + 85448925.

It is an arithmetic number, because the mean of its divisors is an integer number (85448925).

Almost surely, 2^170897849 is an apocalyptic number.

It is an amenable number.

170897849 is a deficient number, since it is larger than the sum of its proper divisors (1).

170897849 is an equidigital number, since it uses as much as digits as its factorization.

170897849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 170897849 is about 13072.7904060304. The cubic root of 170897849 is about 554.9393640976.

The spelling of 170897849 in words is "one hundred seventy million, eight hundred ninety-seven thousand, eight hundred forty-nine".