2142239993 has 2 divisors, whose sum is σ = 2142239994. Its totient is φ = 2142239992.

The previous prime is 2142239963. The next prime is 2142240011. The reversal of 2142239993 is 3999322412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2142116089 + 123904 = 46283^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142239993 - 2¹⁶ = 2142174457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2142239963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071119996 + 1071119997.

It is an arithmetic number, because the mean of its divisors is an integer number (1071119997).

Almost surely, 2^2142239993 is an apocalyptic number.

It is an amenable number.

2142239993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142239993 is an equidigital number, since it uses as much as digits as its factorization.

2142239993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 2142239993 is about 46284.3385282754. The cubic root of 2142239993 is about 1289.1082098308.

The spelling of 2142239993 in words is "two billion, one hundred forty-two million, two hundred thirty-nine thousand, nine hundred ninety-three".