1043199909 has 12 divisors (see below), whose sum is σ = 1541887776. Its totient is φ = 679292712.

The previous prime is 1043199893. The next prime is 1043199923. The reversal of 1043199909 is 9099913401.

It is not a de Polignac number, because 1043199909 - 2⁴ = 1043199893 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043199929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1347417 + ... + 1348190.

It is an arithmetic number, because the mean of its divisors is an integer number (128490648).

Almost surely, 2^1043199909 is an apocalyptic number.

It is an amenable number.

1043199909 is a deficient number, since it is larger than the sum of its proper divisors (498687867).

1043199909 is a wasteful number, since it uses less digits than its factorization.

1043199909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695656 (or 2695653 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 1043199909 is about 32298.6053723686. The cubic root of 1043199909 is about 1014.1974482159.

The spelling of 1043199909 in words is "one billion, forty-three million, one hundred ninety-nine thousand, nine hundred nine".