16053309 has 42 divisors (see below), whose sum is σ = 25818846. Its totient is φ = 9972720.

The previous prime is 16053307. The next prime is 16053341. The reversal of 16053309 is 90335061.

It can be written as a sum of positive squares in only one way, i.e., 9474084 + 6579225 = 3078^2 + 2565^2 .

It is not a de Polignac number, because 16053309 - 2¹ = 16053307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16053307) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 263139 + ... + 263199.

Almost surely, 2^16053309 is an apocalyptic number.

16053309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16053309 is a deficient number, since it is larger than the sum of its proper divisors (9765537).

16053309 is an frugal number, since it uses more digits than its factorization.

16053309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 16053309 is about 4006.6580837401. The cubic root of 16053309 is about 252.2637544587.

The spelling of 16053309 in words is "sixteen million, fifty-three thousand, three hundred nine".