2123399 has 4 divisors (see below), whose sum is σ = 2137800. Its totient is φ = 2109000.

The previous prime is 2123377. The next prime is 2123411. The reversal of 2123399 is 9933212.

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 2123399 - 2¹⁶ = 2057863 is a prime.

It is a d-powerful number, because it can be written as 2 + 1 + 2²¹ + 3⁸ + 3⁸ + 9⁴ + 9⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123309) 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, 6977 + ... + 7274.

It is an arithmetic number, because the mean of its divisors is an integer number (534450).

2^2123399 is an apocalyptic number.

2123399 is a deficient number, since it is larger than the sum of its proper divisors (14401).

2123399 is a wasteful number, since it uses less digits than its factorization.

2123399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14400.

The product of its digits is 2916, while the sum is 29.

The square root of 2123399 is about 1457.1887317709. The cubic root of 2123399 is about 128.5317841910.

The spelling of 2123399 in words is "two million, one hundred twenty-three thousand, three hundred ninety-nine".