2123885647 has 16 divisors (see below), whose sum is σ = 2314312000. Its totient is φ = 1937405952.

The previous prime is 2123885611. The next prime is 2123885651. The reversal of 2123885647 is 7465883212.

It is a cyclic number.

It is not a de Polignac number, because 2123885647 - 2¹⁵ = 2123852879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123885597 and 2123885606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123885147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771229 + ... + 773977.

It is an arithmetic number, because the mean of its divisors is an integer number (144644500).

Almost surely, 2^2123885647 is an apocalyptic number.

2123885647 is a deficient number, since it is larger than the sum of its proper divisors (190426353).

2123885647 is a wasteful number, since it uses less digits than its factorization.

2123885647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442.

The product of its digits is 645120, while the sum is 46.

The square root of 2123885647 is about 46085.6338461347. The cubic root of 2123885647 is about 1285.4160254186.

It can be divided in two parts, 21238856 and 47, that added together give a triangular number (21238903 = T₆₅₁₇).

The spelling of 2123885647 in words is "two billion, one hundred twenty-three million, eight hundred eighty-five thousand, six hundred forty-seven".