16799993 has 12 divisors (see below), whose sum is σ = 19914660. Its totient is φ = 14126112.

The previous prime is 16799989. The next prime is 16800023. The reversal of 16799993 is 39999761.

It can be written as a sum of positive squares in 2 ways, for example, as 5697769 + 11102224 = 2387^2 + 3332^2 .

It is not a de Polignac number, because 16799993 - 2² = 16799989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16799953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 638 + ... + 5831.

It is an arithmetic number, because the mean of its divisors is an integer number (1659555).

Almost surely, 2^16799993 is an apocalyptic number.

It is an amenable number.

16799993 is a deficient number, since it is larger than the sum of its proper divisors (3114667).

16799993 is an equidigital number, since it uses as much as digits as its factorization.

16799993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536 (or 6529 counting only the distinct ones).

The product of its digits is 826686, while the sum is 53.

The square root of 16799993 is about 4098.7794524712. The cubic root of 16799993 is about 256.1157974259.

The spelling of 16799993 in words is "sixteen million, seven hundred ninety-nine thousand, nine hundred ninety-three".