16422309 has 6 divisors (see below), whose sum is σ = 23721126. Its totient is φ = 10948200.

The previous prime is 16422293. The next prime is 16422313. The reversal of 16422309 is 90322461.

It can be written as a sum of positive squares in only one way, i.e., 16378209 + 44100 = 4047^2 + 210^2 .

It is not a de Polignac number, because 16422309 - 2⁴ = 16422293 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16422319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 912342 + ... + 912359.

It is an arithmetic number, because the mean of its divisors is an integer number (3953521).

Almost surely, 2^16422309 is an apocalyptic number.

It is an amenable number.

16422309 is a deficient number, since it is larger than the sum of its proper divisors (7298817).

16422309 is a wasteful number, since it uses less digits than its factorization.

16422309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824707 (or 1824704 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 16422309 is about 4052.4448176379. Note that the first 3 decimals coincide. The cubic root of 16422309 is about 254.1819691345.

The spelling of 16422309 in words is "sixteen million, four hundred twenty-two thousand, three hundred nine".