2123999993 has 2 divisors, whose sum is σ = 2123999994. Its totient is φ = 2123999992.

The previous prime is 2123999989. The next prime is 2124000001. The reversal of 2123999993 is 3999993212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1632402409 + 491597584 = 40403^2 + 22172^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123999993 - 2² = 2123999989 is a prime.

It is a super-2 number, since 2×2123999993² = 9022751940528000098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2123999903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061999996 + 1061999997.

It is an arithmetic number, because the mean of its divisors is an integer number (1061999997).

Almost surely, 2^2123999993 is an apocalyptic number.

It is an amenable number.

2123999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123999993 is an equidigital number, since it uses as much as digits as its factorization.

2123999993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2125764, while the sum is 56.

The square root of 2123999993 is about 46086.8744112681. The cubic root of 2123999993 is about 1285.4390931300.

The spelling of 2123999993 in words is "two billion, one hundred twenty-three million, nine hundred ninety-nine thousand, nine hundred ninety-three".