17970427 has 4 divisors (see below), whose sum is σ = 18101736. Its totient is φ = 17839120.

The previous prime is 17970361. The next prime is 17970437. The reversal of 17970427 is 72407971.

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 17970427 - 2⁷ = 17970299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17970437) 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, 65449 + ... + 65722.

It is an arithmetic number, because the mean of its divisors is an integer number (4525434).

Almost surely, 2^17970427 is an apocalyptic number.

17970427 is a deficient number, since it is larger than the sum of its proper divisors (131309).

17970427 is a wasteful number, since it uses less digits than its factorization.

17970427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131308.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 17970427 is about 4239.1540429666. The cubic root of 17970427 is about 261.9305363311.

The spelling of 17970427 in words is "seventeen million, nine hundred seventy thousand, four hundred twenty-seven".