16226993 has 6 divisors (see below), whose sum is σ = 17199126. Its totient is φ = 15256832.

The previous prime is 16226927. The next prime is 16227011. The reversal of 16226993 is 39962261.

It can be written as a sum of positive squares in 3 ways, for example, as 12475024 + 3751969 = 3532^2 + 1937^2 .

It is not a de Polignac number, because 16226993 - 2⁸ = 16226737 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (16226923) 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, 16121 + ... + 17097.

It is an arithmetic number, because the mean of its divisors is an integer number (2866521).

Almost surely, 2^16226993 is an apocalyptic number.

It is an amenable number.

16226993 is a deficient number, since it is larger than the sum of its proper divisors (972133).

16226993 is an frugal number, since it uses more digits than its factorization.

16226993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971 (or 994 counting only the distinct ones).

The product of its digits is 34992, while the sum is 38.

The square root of 16226993 is about 4028.2741962285. The cubic root of 16226993 is about 253.1702572738.

The spelling of 16226993 in words is "sixteen million, two hundred twenty-six thousand, nine hundred ninety-three".