170991063 has 6 divisors (see below), whose sum is σ = 246987104. Its totient is φ = 113994036.

The previous prime is 170991043. The next prime is 170991077. The reversal of 170991063 is 360199071.

It is not a de Polignac number, because 170991063 - 2⁶ = 170990999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170991043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9499495 + ... + 9499512.

Almost surely, 2^170991063 is an apocalyptic number.

170991063 is a deficient number, since it is larger than the sum of its proper divisors (75996041).

170991063 is a wasteful number, since it uses less digits than its factorization.

170991063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18999013 (or 18999010 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 170991063 is about 13076.3551114215. The cubic root of 170991063 is about 555.0402405690.

The spelling of 170991063 in words is "one hundred seventy million, nine hundred ninety-one thousand, sixty-three".