1038391209 has 12 divisors (see below), whose sum is σ = 1525321200. Its totient is φ = 680527224.

The previous prime is 1038391169. The next prime is 1038391231. The reversal of 1038391209 is 9021938301.

It is not a de Polignac number, because 1038391209 - 2²³ = 1030002601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1038391009) 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, 977239 + ... + 978300.

It is an arithmetic number, because the mean of its divisors is an integer number (127110100).

Almost surely, 2^1038391209 is an apocalyptic number.

It is an amenable number.

1038391209 is a deficient number, since it is larger than the sum of its proper divisors (486929991).

1038391209 is a wasteful number, since it uses less digits than its factorization.

1038391209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955604 (or 1955601 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1038391209 is about 32224.0780938726. The cubic root of 1038391209 is about 1012.6367105753.

The spelling of 1038391209 in words is "one billion, thirty-eight million, three hundred ninety-one thousand, two hundred nine".