16243499 has 4 divisors (see below), whose sum is σ = 17098440. Its totient is φ = 15388560.

The previous prime is 16243471. The next prime is 16243531. The reversal of 16243499 is 99434261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16243499 - 2¹⁶ = 16177963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16243099) 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 in 3 ways as a sum of consecutive naturals, for example, 427442 + ... + 427479.

It is an arithmetic number, because the mean of its divisors is an integer number (4274610).

Almost surely, 2^16243499 is an apocalyptic number.

16243499 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16243499 is a deficient number, since it is larger than the sum of its proper divisors (854941).

16243499 is an equidigital number, since it uses as much as digits as its factorization.

16243499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854940.

The product of its digits is 46656, while the sum is 38.

The square root of 16243499 is about 4030.3224436762. The cubic root of 16243499 is about 253.2560692739.

The spelling of 16243499 in words is "sixteen million, two hundred forty-three thousand, four hundred ninety-nine".