2047640869 has 4 divisors (see below), whose sum is σ = 2091207744. Its totient is φ = 2004073996.

The previous prime is 2047640851. The next prime is 2047640897. The reversal of 2047640869 is 9680467402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2047640869 - 2¹¹ = 2047638821 is a prime.

It is a super-2 number, since 2×2047640869² = 8385666256798150322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2047640269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21783367 + ... + 21783460.

It is an arithmetic number, because the mean of its divisors is an integer number (522801936).

Almost surely, 2^2047640869 is an apocalyptic number.

It is an amenable number.

2047640869 is a deficient number, since it is larger than the sum of its proper divisors (43566875).

2047640869 is an equidigital number, since it uses as much as digits as its factorization.

2047640869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43566874.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 2047640869 is about 45250.8659475153. The cubic root of 2047640869 is about 1269.8466074270.

The spelling of 2047640869 in words is "two billion, forty-seven million, six hundred forty thousand, eight hundred sixty-nine".