17939245 has 8 divisors (see below), whose sum is σ = 21892320. Its totient is φ = 14107920.

The previous prime is 17939237. The next prime is 17939261. The reversal of 17939245 is 54293971.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 17939245 - 2³ = 17939237 is a prime.

It is a super-2 number, since 2×17939245² = 643633022340050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 17939198 and 17939207.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30111 + ... + 30700.

It is an arithmetic number, because the mean of its divisors is an integer number (2736540).

Almost surely, 2^17939245 is an apocalyptic number.

It is an amenable number.

17939245 is a deficient number, since it is larger than the sum of its proper divisors (3953075).

17939245 is an equidigital number, since it uses as much as digits as its factorization.

17939245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60875.

The product of its digits is 68040, while the sum is 40.

The square root of 17939245 is about 4235.4745897007. The cubic root of 17939245 is about 261.7789493823.

The spelling of 17939245 in words is "seventeen million, nine hundred thirty-nine thousand, two hundred forty-five".