2047721869 has 4 divisors (see below), whose sum is σ = 2048058400. Its totient is φ = 2047385340.

The previous prime is 2047721867. The next prime is 2047721891. The reversal of 2047721869 is 9681277402.

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 2047721869 - 2¹ = 2047721867 is a prime.

It is a super-2 number, since 2×2047721869² = 8386329705561706322, 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 (2047721867) 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, 158967 + ... + 171364.

It is an arithmetic number, because the mean of its divisors is an integer number (512014600).

Almost surely, 2^2047721869 is an apocalyptic number.

It is an amenable number.

2047721869 is a deficient number, since it is larger than the sum of its proper divisors (336531).

2047721869 is an equidigital number, since it uses as much as digits as its factorization.

2047721869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336530.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 2047721869 is about 45251.7609491609. The cubic root of 2047721869 is about 1269.8633512842.

The spelling of 2047721869 in words is "two billion, forty-seven million, seven hundred twenty-one thousand, eight hundred sixty-nine".