2047693909 has 4 divisors (see below), whose sum is σ = 2058303916. Its totient is φ = 2037083904.

The previous prime is 2047693903. The next prime is 2047693919. The reversal of 2047693909 is 9093967402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1504664100 + 543029809 = 38790^2 + 23303^2 .

It is a cyclic number.

It is not a de Polignac number, because 2047693909 - 2²⁷ = 1913476181 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 (2047693903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5304714 + ... + 5305099.

It is an arithmetic number, because the mean of its divisors is an integer number (514575979).

Almost surely, 2^2047693909 is an apocalyptic number.

It is an amenable number.

2047693909 is a deficient number, since it is larger than the sum of its proper divisors (10610007).

2047693909 is a wasteful number, since it uses less digits than its factorization.

2047693909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610006.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 2047693909 is about 45251.4520098527. The cubic root of 2047693909 is about 1269.8575716027.

The spelling of 2047693909 in words is "two billion, forty-seven million, six hundred ninety-three thousand, nine hundred nine".