170117923 has 2 divisors, whose sum is σ = 170117924. Its totient is φ = 170117922.

The previous prime is 170117911. The next prime is 170117939. The reversal of 170117923 is 329711071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 170117923 - 2²¹ = 168020771 is a prime.

It is a super-3 number, since 3×170117923³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (170117903) 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, 85058961 + 85058962.

It is an arithmetic number, because the mean of its divisors is an integer number (85058962).

Almost surely, 2^170117923 is an apocalyptic number.

170117923 is a deficient number, since it is larger than the sum of its proper divisors (1).

170117923 is an equidigital number, since it uses as much as digits as its factorization.

170117923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 170117923 is about 13042.9261670838. The cubic root of 170117923 is about 554.0938849171.

Adding to 170117923 its reverse (329711071), we get a palindrome (499828994).

The spelling of 170117923 in words is "one hundred seventy million, one hundred seventeen thousand, nine hundred twenty-three".