16259993 has 2 divisors, whose sum is σ = 16259994. Its totient is φ = 16259992.

The previous prime is 16259989. The next prime is 16260001. The reversal of 16259993 is 39995261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16216729 + 43264 = 4027^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 16259993 - 2² = 16259989 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16259933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8129996 + 8129997.

It is an arithmetic number, because the mean of its divisors is an integer number (8129997).

Almost surely, 2^16259993 is an apocalyptic number.

It is an amenable number.

16259993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16259993 is an equidigital number, since it uses as much as digits as its factorization.

16259993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 44.

The square root of 16259993 is about 4032.3681627550. The cubic root of 16259993 is about 253.3417608384.

The spelling of 16259993 in words is "sixteen million, two hundred fifty-nine thousand, nine hundred ninety-three".