2128629919 has 4 divisors (see below), whose sum is σ = 2292370696. Its totient is φ = 1964889144.

The previous prime is 2128629917. The next prime is 2128629931. The reversal of 2128629919 is 9199268212.

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 2128629919 - 2¹ = 2128629917 is a prime.

It is a super-3 number, since 3×2128629919³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128629917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81870369 + ... + 81870394.

It is an arithmetic number, because the mean of its divisors is an integer number (573092674).

Almost surely, 2^2128629919 is an apocalyptic number.

2128629919 is a deficient number, since it is larger than the sum of its proper divisors (163740777).

2128629919 is a wasteful number, since it uses less digits than its factorization.

2128629919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163740776.

The product of its digits is 279936, while the sum is 49.

The square root of 2128629919 is about 46137.0774865509. The cubic root of 2128629919 is about 1286.3724215587.

The spelling of 2128629919 in words is "two billion, one hundred twenty-eight million, six hundred twenty-nine thousand, nine hundred nineteen".