16428779 has 2 divisors, whose sum is σ = 16428780. Its totient is φ = 16428778.

The previous prime is 16428757. The next prime is 16428829. The reversal of 16428779 is 97782461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16428779 - 2²⁰ = 15380203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16428719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8214389 + 8214390.

It is an arithmetic number, because the mean of its divisors is an integer number (8214390).

Almost surely, 2^16428779 is an apocalyptic number.

16428779 is a deficient number, since it is larger than the sum of its proper divisors (1).

16428779 is an equidigital number, since it uses as much as digits as its factorization.

16428779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 16428779 is about 4053.2430225685. The cubic root of 16428779 is about 254.2153453062.

The spelling of 16428779 in words is "sixteen million, four hundred twenty-eight thousand, seven hundred seventy-nine".