16963993 has 2 divisors, whose sum is σ = 16963994. Its totient is φ = 16963992.

The previous prime is 16963987. The next prime is 16964021. The reversal of 16963993 is 39936961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11641744 + 5322249 = 3412^2 + 2307^2 .

It is a cyclic number.

It is not a de Polignac number, because 16963993 - 2⁹ = 16963481 is a prime.

It is not a weakly prime, because it can be changed into another prime (16963393) 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, 8481996 + 8481997.

It is an arithmetic number, because the mean of its divisors is an integer number (8481997).

Almost surely, 2^16963993 is an apocalyptic number.

It is an amenable number.

16963993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16963993 is an equidigital number, since it uses as much as digits as its factorization.

16963993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 46.

The square root of 16963993 is about 4118.7368209197. The cubic root of 16963993 is about 256.9464932237.

It can be divided in two parts, 16963 and 993, that added together give a square (17956 = 134²).

The spelling of 16963993 in words is "sixteen million, nine hundred sixty-three thousand, nine hundred ninety-three".