5219999123 has 2 divisors, whose sum is σ = 5219999124. Its totient is φ = 5219999122.

The previous prime is 5219999119. The next prime is 5219999237. The reversal of 5219999123 is 3219999125.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5219999123 - 2² = 5219999119 is a prime.

It is not a weakly prime, because it can be changed into another prime (5219999723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2609999561 + 2609999562.

It is an arithmetic number, because the mean of its divisors is an integer number (2609999562).

Almost surely, 2^5219999123 is an apocalyptic number.

5219999123 is a deficient number, since it is larger than the sum of its proper divisors (1).

5219999123 is an equidigital number, since it uses as much as digits as its factorization.

5219999123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 50.

The square root of 5219999123 is about 72249.5614035130. The cubic root of 5219999123 is about 1734.6963979172.

The spelling of 5219999123 in words is "five billion, two hundred nineteen million, nine hundred ninety-nine thousand, one hundred twenty-three".