170978611 has 4 divisors (see below), whose sum is σ = 171838000. Its totient is φ = 170119224.

The previous prime is 170978581. The next prime is 170978623. The reversal of 170978611 is 116879071.

170978611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 170978611 - 2¹⁵ = 170945843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170978641) 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, 429396 + ... + 429793.

It is an arithmetic number, because the mean of its divisors is an integer number (42959500).

Almost surely, 2^170978611 is an apocalyptic number.

170978611 is a deficient number, since it is larger than the sum of its proper divisors (859389).

170978611 is an equidigital number, since it uses as much as digits as its factorization.

170978611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859388.

The product of its (nonzero) digits is 21168, while the sum is 40.

The square root of 170978611 is about 13075.8789761912. The cubic root of 170978611 is about 555.0267670990.

The spelling of 170978611 in words is "one hundred seventy million, nine hundred seventy-eight thousand, six hundred eleven".