1040019989 has 4 divisors (see below), whose sum is σ = 1040090220. Its totient is φ = 1039949760.

The previous prime is 1040019979. The next prime is 1040020001. The reversal of 1040019989 is 9899100401.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9899100401 = 3527 ⋅2806663.

It can be written as a sum of positive squares in 2 ways, for example, as 443439364 + 596580625 = 21058^2 + 24425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040019989 - 2²⁰ = 1038971413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040019949) 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, 3284 + ... + 45725.

It is an arithmetic number, because the mean of its divisors is an integer number (260022555).

Almost surely, 2^1040019989 is an apocalyptic number.

It is an amenable number.

1040019989 is a deficient number, since it is larger than the sum of its proper divisors (70231).

1040019989 is an equidigital number, since it uses as much as digits as its factorization.

1040019989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70230.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 1040019989 is about 32249.3409079938. The cubic root of 1040019989 is about 1013.1658948181.

The spelling of 1040019989 in words is "one billion, forty million, nineteen thousand, nine hundred eighty-nine".