170942749 has 2 divisors, whose sum is σ = 170942750. Its totient is φ = 170942748.

The previous prime is 170942747. The next prime is 170942843. The reversal of 170942749 is 947249071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166023225 + 4919524 = 12885^2 + 2218^2 .

It is a cyclic number.

It is not a de Polignac number, because 170942749 - 2¹ = 170942747 is a prime.

Together with 170942747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170942741) 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, 85471374 + 85471375.

It is an arithmetic number, because the mean of its divisors is an integer number (85471375).

Almost surely, 2^170942749 is an apocalyptic number.

It is an amenable number.

170942749 is a deficient number, since it is larger than the sum of its proper divisors (1).

170942749 is an equidigital number, since it uses as much as digits as its factorization.

170942749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 170942749 is about 13074.5076006709. The cubic root of 170942749 is about 554.9879595905.

The spelling of 170942749 in words is "one hundred seventy million, nine hundred forty-two thousand, seven hundred forty-nine".