2128523903 has 4 divisors (see below), whose sum is σ = 2322026088. Its totient is φ = 1935021720.

The previous prime is 2128523899. The next prime is 2128523909. The reversal of 2128523903 is 3093258212.

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

It is a cyclic number.

It is not a de Polignac number, because 2128523903 - 2² = 2128523899 is a prime.

It is a super-2 number, since 2×2128523903² = 9061228011284706818, 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 (2128523909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96751076 + ... + 96751097.

It is an arithmetic number, because the mean of its divisors is an integer number (580506522).

Almost surely, 2^2128523903 is an apocalyptic number.

2128523903 is a deficient number, since it is larger than the sum of its proper divisors (193502185).

2128523903 is a wasteful number, since it uses less digits than its factorization.

2128523903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193502184.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2128523903 is about 46135.9285481500. The cubic root of 2128523903 is about 1286.3510653612.

The spelling of 2128523903 in words is "two billion, one hundred twenty-eight million, five hundred twenty-three thousand, nine hundred three".