170112981 has 4 divisors (see below), whose sum is σ = 226817312. Its totient is φ = 113408652.

The previous prime is 170112979. The next prime is 170112997. The reversal of 170112981 is 189211071.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 170112981 - 2¹ = 170112979 is a prime.

It is a super-2 number, since 2×170112981² = 57876852609412722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170112781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28352161 + ... + 28352166.

It is an arithmetic number, because the mean of its divisors is an integer number (56704328).

Almost surely, 2^170112981 is an apocalyptic number.

It is an amenable number.

170112981 is a deficient number, since it is larger than the sum of its proper divisors (56704331).

170112981 is an equidigital number, since it uses as much as digits as its factorization.

170112981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56704330.

The product of its (nonzero) digits is 1008, while the sum is 30.

The square root of 170112981 is about 13042.7367143556. The cubic root of 170112981 is about 554.0885193087.

The spelling of 170112981 in words is "one hundred seventy million, one hundred twelve thousand, nine hundred eighty-one".