16993793 has 2 divisors, whose sum is σ = 16993794. Its totient is φ = 16993792.

The previous prime is 16993789. The next prime is 16993799. The reversal of 16993793 is 39739961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13778944 + 3214849 = 3712^2 + 1793^2 .

It is a cyclic number.

It is not a de Polignac number, because 16993793 - 2² = 16993789 is a prime.

It is not a weakly prime, because it can be changed into another prime (16993799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8496896 + 8496897.

It is an arithmetic number, because the mean of its divisors is an integer number (8496897).

Almost surely, 2^16993793 is an apocalyptic number.

It is an amenable number.

16993793 is a deficient number, since it is larger than the sum of its proper divisors (1).

16993793 is an equidigital number, since it uses as much as digits as its factorization.

16993793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 275562, while the sum is 47.

The square root of 16993793 is about 4122.3528475860. The cubic root of 16993793 is about 257.0968612469.

The spelling of 16993793 in words is "sixteen million, nine hundred ninety-three thousand, seven hundred ninety-three".