17442939 has 4 divisors (see below), whose sum is σ = 23257256. Its totient is φ = 11628624.

The previous prime is 17442923. The next prime is 17442941. The reversal of 17442939 is 93924471.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 17442939 - 2⁴ = 17442923 is a prime.

It is a super-2 number, since 2×17442939² = 608512241915442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17442897 and 17442906.

It is not an unprimeable number, because it can be changed into a prime (17442959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2907154 + ... + 2907159.

It is an arithmetic number, because the mean of its divisors is an integer number (5814314).

Almost surely, 2^17442939 is an apocalyptic number.

17442939 is a deficient number, since it is larger than the sum of its proper divisors (5814317).

17442939 is an equidigital number, since it uses as much as digits as its factorization.

17442939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5814316.

The product of its digits is 54432, while the sum is 39.

The square root of 17442939 is about 4176.4744701722. The cubic root of 17442939 is about 259.3422179307.

It can be divided in two parts, 17442 and 939, that added together give a palindrome (18381).

The spelling of 17442939 in words is "seventeen million, four hundred forty-two thousand, nine hundred thirty-nine".