2123913 has 12 divisors (see below), whose sum is σ = 3113264. Its totient is φ = 1287000.

The previous prime is 2123909. The next prime is 2123917. The reversal of 2123913 is 3193212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2123909) and next prime (2123917).

It is not a de Polignac number, because 2123913 - 2² = 2123909 is a prime.

It is a super-2 number, since 2×2123913² = 9022012863138, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁹ + 1 + 2²¹ + 3 + 9⁴ + 1 + 3⁹ .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123913.

It is not an unprimeable number, because it can be changed into a prime (2123917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2563 + ... + 3288.

2^2123913 is an apocalyptic number.

It is an amenable number.

2123913 is a deficient number, since it is larger than the sum of its proper divisors (989351).

2123913 is a wasteful number, since it uses less digits than its factorization.

2123913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5876 (or 5865 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

The square root of 2123913 is about 1457.3650880956. The cubic root of 2123913 is about 128.5421543580.

The spelling of 2123913 in words is "two million, one hundred twenty-three thousand, nine hundred thirteen".