2139223993 has 2 divisors, whose sum is σ = 2139223994. Its totient is φ = 2139223992.

The previous prime is 2139223991. The next prime is 2139224033. The reversal of 2139223993 is 3993229312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1502570169 + 636653824 = 38763^2 + 25232^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139223993 - 2¹ = 2139223991 is a prime.

Together with 2139223991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2139223991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069611996 + 1069611997.

It is an arithmetic number, because the mean of its divisors is an integer number (1069611997).

Almost surely, 2^2139223993 is an apocalyptic number.

It is an amenable number.

2139223993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139223993 is an equidigital number, since it uses as much as digits as its factorization.

2139223993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 43.

The square root of 2139223993 is about 46251.7458373195. The cubic root of 2139223993 is about 1288.5029591926.

The spelling of 2139223993 in words is "two billion, one hundred thirty-nine million, two hundred twenty-three thousand, nine hundred ninety-three".