170239961 has 2 divisors, whose sum is σ = 170239962. Its totient is φ = 170239960.

The previous prime is 170239891. The next prime is 170239963. The reversal of 170239961 is 169932071.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131239936 + 39000025 = 11456^2 + 6245^2 .

It is a cyclic number.

It is not a de Polignac number, because 170239961 - 2¹⁴ = 170223577 is a prime.

Together with 170239963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (170239963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85119980 + 85119981.

It is an arithmetic number, because the mean of its divisors is an integer number (85119981).

Almost surely, 2^170239961 is an apocalyptic number.

It is an amenable number.

170239961 is a deficient number, since it is larger than the sum of its proper divisors (1).

170239961 is an equidigital number, since it uses as much as digits as its factorization.

170239961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 170239961 is about 13047.6036497128. The cubic root of 170239961 is about 554.2263505721.

The spelling of 170239961 in words is "one hundred seventy million, two hundred thirty-nine thousand, nine hundred sixty-one".