1009836909 has 32 divisors (see below), whose sum is σ = 1577110400. Its totient is φ = 636854400.

The previous prime is 1009836899. The next prime is 1009836917. The reversal of 1009836909 is 9096389001.

It is not a de Polignac number, because 1009836909 - 2²⁴ = 993059693 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 (1009834909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 559809 + ... + 561609.

It is an arithmetic number, because the mean of its divisors is an integer number (49284700).

Almost surely, 2^1009836909 is an apocalyptic number.

1009836909 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1009836909 is a deficient number, since it is larger than the sum of its proper divisors (567273491).

1009836909 is a wasteful number, since it uses less digits than its factorization.

1009836909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922 (or 2916 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 1009836909 is about 31777.9311629942. The cubic root of 1009836909 is about 1003.2682763992.

The spelling of 1009836909 in words is "one billion, nine million, eight hundred thirty-six thousand, nine hundred nine".