1000321989 has 8 divisors (see below), whose sum is σ = 1341214560. Its totient is φ = 663155376.

The previous prime is 1000321901. The next prime is 1000322017. The reversal of 1000321989 is 9891230001.

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

It is a de Polignac number, because none of the positive numbers 2^k-1000321989 is a prime.

It is a super-2 number, since 2×1000321989² = 2001288163353832242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000329989) 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, 930862 + ... + 931935.

It is an arithmetic number, because the mean of its divisors is an integer number (167651820).

Almost surely, 2^1000321989 is an apocalyptic number.

It is an amenable number.

1000321989 is a deficient number, since it is larger than the sum of its proper divisors (340892571).

1000321989 is a wasteful number, since it uses less digits than its factorization.

1000321989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862979.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1000321989 is about 31627.8672850384. The cubic root of 1000321989 is about 1000.1073181491.

The spelling of 1000321989 in words is "one billion, three hundred twenty-one thousand, nine hundred eighty-nine".