17930121 has 32 divisors (see below), whose sum is σ = 28532736. Its totient is φ = 9888000.

The previous prime is 17930117. The next prime is 17930123. The reversal of 17930121 is 12103971.

It is not a de Polignac number, because 17930121 - 2² = 17930117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17930091 and 17930100.

It is not an unprimeable number, because it can be changed into a prime (17930123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16876 + ... + 17906.

It is an arithmetic number, because the mean of its divisors is an integer number (891648).

Almost surely, 2^17930121 is an apocalyptic number.

17930121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

17930121 is a deficient number, since it is larger than the sum of its proper divisors (10602615).

17930121 is a wasteful number, since it uses less digits than its factorization.

17930121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 17930121 is about 4234.3973597196. The cubic root of 17930121 is about 261.7345611118.

The spelling of 17930121 in words is "seventeen million, nine hundred thirty thousand, one hundred twenty-one".