17942109 has 8 divisors (see below), whose sum is σ = 24432000. Its totient is φ = 11706816.

The previous prime is 17942101. The next prime is 17942129. The reversal of 17942109 is 90124971.

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

It is not a de Polignac number, because 17942109 - 2³ = 17942101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17942109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17942101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63484 + ... + 63765.

It is an arithmetic number, because the mean of its divisors is an integer number (3054000).

Almost surely, 2^17942109 is an apocalyptic number.

It is an amenable number.

17942109 is a deficient number, since it is larger than the sum of its proper divisors (6489891).

17942109 is a wasteful number, since it uses less digits than its factorization.

17942109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127299.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 17942109 is about 4235.8126729118. The cubic root of 17942109 is about 261.7928796418.

The spelling of 17942109 in words is "seventeen million, nine hundred forty-two thousand, one hundred nine".