17942429 has 4 divisors (see below), whose sum is σ = 18997884. Its totient is φ = 16886976.

The previous prime is 17942417. The next prime is 17942443. The reversal of 17942429 is 92424971.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15760900 + 2181529 = 3970^2 + 1477^2 .

It is a cyclic number.

It is not a de Polignac number, because 17942429 - 2⁴ = 17942413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17942392 and 17942401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17942129) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 527702 + ... + 527735.

It is an arithmetic number, because the mean of its divisors is an integer number (4749471).

Almost surely, 2^17942429 is an apocalyptic number.

It is an amenable number.

17942429 is a deficient number, since it is larger than the sum of its proper divisors (1055455).

17942429 is a wasteful number, since it uses less digits than its factorization.

17942429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055454.

The product of its digits is 36288, while the sum is 38.

The square root of 17942429 is about 4235.8504458963. The cubic root of 17942429 is about 261.7944360033.

The spelling of 17942429 in words is "seventeen million, nine hundred forty-two thousand, four hundred twenty-nine".