170223149 has 2 divisors, whose sum is σ = 170223150. Its totient is φ = 170223148.

The previous prime is 170223107. The next prime is 170223181. The reversal of 170223149 is 941322071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146845924 + 23377225 = 12118^2 + 4835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170223149 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 (170213149) 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, 85111574 + 85111575.

It is an arithmetic number, because the mean of its divisors is an integer number (85111575).

Almost surely, 2^170223149 is an apocalyptic number.

It is an amenable number.

170223149 is a deficient number, since it is larger than the sum of its proper divisors (1).

170223149 is an equidigital number, since it uses as much as digits as its factorization.

170223149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 170223149 is about 13046.9593775715. The cubic root of 170223149 is about 554.2081058151.

The spelling of 170223149 in words is "one hundred seventy million, two hundred twenty-three thousand, one hundred forty-nine".