1047999209 has 8 divisors (see below), whose sum is σ = 1100277312. Its totient is φ = 996280560.

The previous prime is 1047999191. The next prime is 1047999217. The reversal of 1047999209 is 9029997401.

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

It is a cyclic number.

It is not a de Polignac number, because 1047999209 - 2⁸ = 1047998953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1047999229) 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, 136022 + ... + 143519.

It is an arithmetic number, because the mean of its divisors is an integer number (137534664).

Almost surely, 2^1047999209 is an apocalyptic number.

It is an amenable number.

1047999209 is a deficient number, since it is larger than the sum of its proper divisors (52278103).

1047999209 is a wasteful number, since it uses less digits than its factorization.

1047999209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279727.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 1047999209 is about 32372.8158954392. The cubic root of 1047999209 is about 1015.7503600734.

The spelling of 1047999209 in words is "one billion, forty-seven million, nine hundred ninety-nine thousand, two hundred nine".