1599999969 has 8 divisors (see below), whose sum is σ = 2133521152. Its totient is φ = 1066572720.

The previous prime is 1599999941. The next prime is 1599999971. The reversal of 1599999969 is 9699999951.

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

It is not a de Polignac number, because 1599999969 - 2¹⁶ = 1599934433 is a prime.

It is a super-2 number, since 2×1599999969² = 5119999801600001922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1599999969.

It is not an unprimeable number, because it can be changed into a prime (1599999469) 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 7 ways as a sum of consecutive naturals, for example, 43827 + ... + 71559.

It is an arithmetic number, because the mean of its divisors is an integer number (266690144).

Almost surely, 2^1599999969 is an apocalyptic number.

It is an amenable number.

1599999969 is a deficient number, since it is larger than the sum of its proper divisors (533521183).

1599999969 is a wasteful number, since it uses less digits than its factorization.

1599999969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46967.

The product of its digits is 143489070, while the sum is 75.

The square root of 1599999969 is about 39999.9996125000. Note that the first 3 decimals coincide. The cubic root of 1599999969 is about 1169.6070877314.

The spelling of 1599999969 in words is "one billion, five hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-nine".