1679989195867 has 4 divisors (see below), whose sum is σ = 1768409679880. Its totient is φ = 1591568711856.

The previous prime is 1679989195813. The next prime is 1679989195873. The reversal of 1679989195867 is 7685919899761.

It is a happy number.

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 1679989195867 - 2¹¹ = 1679989193819 is a prime.

It is a super-3 number, since 3×1679989195867³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1679989195667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44210241978 + ... + 44210242015.

It is an arithmetic number, because the mean of its divisors is an integer number (442102419970).

Almost surely, 2^{1679989195867} is an apocalyptic number.

1679989195867 is a deficient number, since it is larger than the sum of its proper divisors (88420484013).

1679989195867 is an equidigital number, since it uses as much as digits as its factorization.

1679989195867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88420484012.

The product of its digits is 3703553280, while the sum is 85.

The spelling of 1679989195867 in words is "one trillion, six hundred seventy-nine billion, nine hundred eighty-nine million, one hundred ninety-five thousand, eight hundred sixty-seven".