978170017 has 4 divisors (see below), whose sum is σ = 1067094576. Its totient is φ = 889245460.

The previous prime is 978170003. The next prime is 978170069. The reversal of 978170017 is 710071879.

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, and also an emirpimes, since its reverse is a distinct semiprime: 710071879 = 11 ⋅64551989.

It is a cyclic number.

It is not a de Polignac number, because 978170017 - 2⁷ = 978169889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978170317) 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, 44462263 + ... + 44462284.

It is an arithmetic number, because the mean of its divisors is an integer number (266773644).

Almost surely, 2^978170017 is an apocalyptic number.

It is an amenable number.

978170017 is a deficient number, since it is larger than the sum of its proper divisors (88924559).

978170017 is a wasteful number, since it uses less digits than its factorization.

978170017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88924558.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 978170017 is about 31275.7096961844. The cubic root of 978170017 is about 992.6697375440.

The spelling of 978170017 in words is "nine hundred seventy-eight million, one hundred seventy thousand, seventeen".