16916993 has 2 divisors, whose sum is σ = 16916994. Its totient is φ = 16916992.

The previous prime is 16916971. The next prime is 16917001. The reversal of 16916993 is 39961961.

It is a happy number.

16916993 is nontrivially palindromic in base 4 and base 16.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12623809 + 4293184 = 3553^2 + 2072^2 .

It is a cyclic number.

It is not a de Polignac number, because 16916993 - 2⁶ = 16916929 is a prime.

It is not a weakly prime, because it can be changed into another prime (16916923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8458496 + 8458497.

It is an arithmetic number, because the mean of its divisors is an integer number (8458497).

Almost surely, 2^16916993 is an apocalyptic number.

It is an amenable number.

16916993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16916993 is an equidigital number, since it uses as much as digits as its factorization.

16916993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 44.

The square root of 16916993 is about 4113.0272306417. The cubic root of 16916993 is about 256.7089773018.

The spelling of 16916993 in words is "sixteen million, nine hundred sixteen thousand, nine hundred ninety-three".