1001887989 has 16 divisors (see below), whose sum is σ = 1356103872. Its totient is φ = 657825408.

The previous prime is 1001887963. The next prime is 1001888057. The reversal of 1001887989 is 9897881001.

It is not a de Polignac number, because 1001887989 - 2⁹ = 1001887477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001886989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169447 + ... + 175259.

It is an arithmetic number, because the mean of its divisors is an integer number (84756492).

Almost surely, 2^1001887989 is an apocalyptic number.

It is an amenable number.

1001887989 is a deficient number, since it is larger than the sum of its proper divisors (354215883).

1001887989 is an equidigital number, since it uses as much as digits as its factorization.

1001887989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6676.

The product of its (nonzero) digits is 290304, while the sum is 51.

The square root of 1001887989 is about 31652.6142522225. The cubic root of 1001887989 is about 1000.6289340257.

The spelling of 1001887989 in words is "one billion, one million, eight hundred eighty-seven thousand, nine hundred eighty-nine".