16428499 has 2 divisors, whose sum is σ = 16428500. Its totient is φ = 16428498.

The previous prime is 16428497. The next prime is 16428527. The reversal of 16428499 is 99482461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16428499 - 2¹ = 16428497 is a prime.

Together with 16428497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16428493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8214249 + 8214250.

It is an arithmetic number, because the mean of its divisors is an integer number (8214250).

Almost surely, 2^16428499 is an apocalyptic number.

16428499 is a deficient number, since it is larger than the sum of its proper divisors (1).

16428499 is an equidigital number, since it uses as much as digits as its factorization.

16428499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 16428499 is about 4053.2084821780. The cubic root of 16428499 is about 254.2139010784.

The spelling of 16428499 in words is "sixteen million, four hundred twenty-eight thousand, four hundred ninety-nine".