16391333 has 12 divisors (see below), whose sum is σ = 19584972. Its totient is φ = 13668480.

The previous prime is 16391329. The next prime is 16391339. The reversal of 16391333 is 33319361.

It can be written as a sum of positive squares in 2 ways, for example, as 15697444 + 693889 = 3962^2 + 833^2 .

It is not a de Polignac number, because 16391333 - 2² = 16391329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16391296 and 16391305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16391339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2708 + ... + 6333.

It is an arithmetic number, because the mean of its divisors is an integer number (1632081).

Almost surely, 2^16391333 is an apocalyptic number.

It is an amenable number.

16391333 is a deficient number, since it is larger than the sum of its proper divisors (3193639).

16391333 is an equidigital number, since it uses as much as digits as its factorization.

16391333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9092 (or 9085 counting only the distinct ones).

The product of its digits is 4374, while the sum is 29.

The square root of 16391333 is about 4048.6211232962. The cubic root of 16391333 is about 254.0220546291.

The spelling of 16391333 in words is "sixteen million, three hundred ninety-one thousand, three hundred thirty-three".