2123003405 has 8 divisors (see below), whose sum is σ = 2564703000. Its totient is φ = 1687003456.

The previous prime is 2123003387. The next prime is 2123003413. The reversal of 2123003405 is 5043003212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 214886281 + 1908117124 = 14659^2 + 43682^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2123003405 - 2⁶ = 2123003341 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1424090 + ... + 1425579.

It is an arithmetic number, because the mean of its divisors is an integer number (320587875).

Almost surely, 2^2123003405 is an apocalyptic number.

It is an amenable number.

2123003405 is a deficient number, since it is larger than the sum of its proper divisors (441699595).

2123003405 is a wasteful number, since it uses less digits than its factorization.

2123003405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849823.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2123003405 is about 46076.0610838210. The cubic root of 2123003405 is about 1285.2380175509.

Adding to 2123003405 its reverse (5043003212), we get a palindrome (7166006617).

The spelling of 2123003405 in words is "two billion, one hundred twenty-three million, three thousand, four hundred five".