1989663027 has 8 divisors (see below), whose sum is σ = 2894055360. Its totient is φ = 1205856360.

The previous prime is 1989662999. The next prime is 1989663031. The reversal of 1989663027 is 7203669891.

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

It is not a de Polignac number, because 1989663027 - 2¹¹ = 1989660979 is a prime.

It is a super-2 number, since 2×1989663027² = 7917517922021605458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1989663037) 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 7 ways as a sum of consecutive naturals, for example, 30146377 + ... + 30146442.

It is an arithmetic number, because the mean of its divisors is an integer number (361756920).

Almost surely, 2^1989663027 is an apocalyptic number.

1989663027 is a deficient number, since it is larger than the sum of its proper divisors (904392333).

1989663027 is a wasteful number, since it uses less digits than its factorization.

1989663027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60292833.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 1989663027 is about 44605.6389596652. The cubic root of 1989663027 is about 1257.7466711863.

The spelling of 1989663027 in words is "one billion, nine hundred eighty-nine million, six hundred sixty-three thousand, twenty-seven".