1678397017 has 8 divisors (see below), whose sum is σ = 1831540032. Its totient is φ = 1525347600.

The previous prime is 1678396999. The next prime is 1678397047. The reversal of 1678397017 is 7107938761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1678397017 - 2¹¹ = 1678394969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1678397047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17167 + ... + 60427.

It is an arithmetic number, because the mean of its divisors is an integer number (228942504).

Almost surely, 2^1678397017 is an apocalyptic number.

It is an amenable number.

1678397017 is a deficient number, since it is larger than the sum of its proper divisors (153143015).

1678397017 is a wasteful number, since it uses less digits than its factorization.

1678397017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46799.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 1678397017 is about 40968.2440067914. The cubic root of 1678397017 is about 1188.4061747648.

The spelling of 1678397017 in words is "one billion, six hundred seventy-eight million, three hundred ninety-seven thousand, seventeen".