16423309 has 16 divisors (see below), whose sum is σ = 20563200. Its totient is φ = 12789504.

The previous prime is 16423289. The next prime is 16423313. The reversal of 16423309 is 90332461.

It is not a de Polignac number, because 16423309 - 2²¹ = 14326157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16423349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1072 + ... + 5830.

It is an arithmetic number, because the mean of its divisors is an integer number (1285200).

Almost surely, 2^16423309 is an apocalyptic number.

It is an amenable number.

16423309 is a deficient number, since it is larger than the sum of its proper divisors (4139891).

16423309 is a wasteful number, since it uses less digits than its factorization.

16423309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 16423309 is about 4052.5681980690. The cubic root of 16423309 is about 254.1871283118.

The spelling of 16423309 in words is "sixteen million, four hundred twenty-three thousand, three hundred nine".