16783420393 has 2 divisors, whose sum is σ = 16783420394. Its totient is φ = 16783420392.

The previous prime is 16783420333. The next prime is 16783420399. The reversal of 16783420393 is 39302438761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9313794064 + 7469626329 = 96508^2 + 86427^2 .

It is a cyclic number.

It is not a de Polignac number, because 16783420393 - 2²⁹ = 16246549481 is a prime.

It is not a weakly prime, because it can be changed into another prime (16783420399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8391710196 + 8391710197.

It is an arithmetic number, because the mean of its divisors is an integer number (8391710197).

Almost surely, 2^16783420393 is an apocalyptic number.

It is an amenable number.

16783420393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16783420393 is an equidigital number, since it uses as much as digits as its factorization.

16783420393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 16783420393 in words is "sixteen billion, seven hundred eighty-three million, four hundred twenty thousand, three hundred ninety-three".