16123993 has 2 divisors, whose sum is σ = 16123994. Its totient is φ = 16123992.

The previous prime is 16123969. The next prime is 16123997. The reversal of 16123993 is 39932161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15586704 + 537289 = 3948^2 + 733^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16123993 is a prime.

It is not a weakly prime, because it can be changed into another prime (16123997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8061996 + 8061997.

It is an arithmetic number, because the mean of its divisors is an integer number (8061997).

Almost surely, 2^16123993 is an apocalyptic number.

It is an amenable number.

16123993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16123993 is an equidigital number, since it uses as much as digits as its factorization.

16123993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 34.

The square root of 16123993 is about 4015.4692129314. The cubic root of 16123993 is about 252.6334581876.

The spelling of 16123993 in words is "sixteen million, one hundred twenty-three thousand, nine hundred ninety-three".