17942939 has 16 divisors (see below), whose sum is σ = 21897216. Its totient is φ = 14352000.

The previous prime is 17942929. The next prime is 17942959. The reversal of 17942939 is 93924971.

It is a cyclic number.

It is not a de Polignac number, because 17942939 - 2⁴ = 17942923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17942939.

It is not an unprimeable number, because it can be changed into a prime (17942929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15014 + ... + 16164.

It is an arithmetic number, because the mean of its divisors is an integer number (1368576).

Almost surely, 2^17942939 is an apocalyptic number.

17942939 is a deficient number, since it is larger than the sum of its proper divisors (3954277).

17942939 is a wasteful number, since it uses less digits than its factorization.

17942939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306.

The product of its digits is 122472, while the sum is 44.

The square root of 17942939 is about 4235.9106458942. The cubic root of 17942939 is about 261.7969164162.

It can be divided in two parts, 17942 and 939, that added together give a palindrome (18881).

The spelling of 17942939 in words is "seventeen million, nine hundred forty-two thousand, nine hundred thirty-nine".