17420983 has 4 divisors (see below), whose sum is σ = 17499328. Its totient is φ = 17342640.

The previous prime is 17420957. The next prime is 17420987. The reversal of 17420983 is 38902471.

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

It is a cyclic number.

It is not a de Polignac number, because 17420983 - 2²¹ = 15323831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17420987) 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, 38838 + ... + 39283.

It is an arithmetic number, because the mean of its divisors is an integer number (4374832).

Almost surely, 2^17420983 is an apocalyptic number.

17420983 is a deficient number, since it is larger than the sum of its proper divisors (78345).

17420983 is an equidigital number, since it uses as much as digits as its factorization.

17420983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78344.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 17420983 is about 4173.8451097280. The cubic root of 17420983 is about 259.2333580547.

The spelling of 17420983 in words is "seventeen million, four hundred twenty thousand, nine hundred eighty-three".