170916993 has 16 divisors (see below), whose sum is σ = 272688640. Its totient is φ = 105179472.

The previous prime is 170916983. The next prime is 170917091. The reversal of 170916993 is 399619071.

It is not a de Polignac number, because 170916993 - 2¹² = 170912897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170916943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243121 + ... + 243822.

It is an arithmetic number, because the mean of its divisors is an integer number (17043040).

Almost surely, 2^170916993 is an apocalyptic number.

170916993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

170916993 is a deficient number, since it is larger than the sum of its proper divisors (101771647).

170916993 is a wasteful number, since it uses less digits than its factorization.

170916993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486965 (or 486959 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 170916993 is about 13073.5225933946. The cubic root of 170916993 is about 554.9600847846.

The spelling of 170916993 in words is "one hundred seventy million, nine hundred sixteen thousand, nine hundred ninety-three".