1969804989 has 12 divisors (see below), whose sum is σ = 2845714300. Its totient is φ = 1313000064.

The previous prime is 1969804987. The next prime is 1969804997. The reversal of 1969804989 is 9894089691.

1969804989 is a `hidden beast` number, since 1 + 9 + 69 + 80 + 498 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1843242489 + 126562500 = 42933^2 + 11250^2 .

It is not a de Polignac number, because 1969804989 - 2¹ = 1969804987 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 (1969804987) 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 11 ways as a sum of consecutive naturals, for example, 65607 + ... + 90795.

Almost surely, 2^1969804989 is an apocalyptic number.

It is an amenable number.

1969804989 is a deficient number, since it is larger than the sum of its proper divisors (875909311).

1969804989 is a wasteful number, since it uses less digits than its factorization.

1969804989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33884 (or 33881 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 63.

The square root of 1969804989 is about 44382.4851602521. The cubic root of 1969804989 is about 1253.5483156872.

The spelling of 1969804989 in words is "one billion, nine hundred sixty-nine million, eight hundred four thousand, nine hundred eighty-nine".