1881989063 has 8 divisors (see below), whose sum is σ = 2022437232. Its totient is φ = 1744845696.

The previous prime is 1881989059. The next prime is 1881989089. The reversal of 1881989063 is 3609891881.

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 1881989063 - 2² = 1881989059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1881988996 and 1881989014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881989033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825020 + ... + 827297.

It is an arithmetic number, because the mean of its divisors is an integer number (252804654).

Almost surely, 2^1881989063 is an apocalyptic number.

1881989063 is a deficient number, since it is larger than the sum of its proper divisors (140448169).

1881989063 is a wasteful number, since it uses less digits than its factorization.

1881989063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652401.

The product of its (nonzero) digits is 746496, while the sum is 53.

The square root of 1881989063 is about 43381.8978722693. The cubic root of 1881989063 is about 1234.6362717814.

The spelling of 1881989063 in words is "one billion, eight hundred eighty-one million, nine hundred eighty-nine thousand, sixty-three".