17973145 has 16 divisors (see below), whose sum is σ = 22818240. Its totient is φ = 13552704.

The previous prime is 17973139. The next prime is 17973161. The reversal of 17973145 is 54137971.

It is a cyclic number.

It is not a de Polignac number, because 17973145 - 2⁷ = 17973017 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 25974 + ... + 26656.

It is an arithmetic number, because the mean of its divisors is an integer number (1426140).

Almost surely, 2^17973145 is an apocalyptic number.

It is an amenable number.

17973145 is a deficient number, since it is larger than the sum of its proper divisors (4845095).

17973145 is a wasteful number, since it uses less digits than its factorization.

17973145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984.

The product of its digits is 26460, while the sum is 37.

The square root of 17973145 is about 4239.4746136756. The cubic root of 17973145 is about 261.9437411983.

It can be divided in two parts, 179731 and 45, that added together give a square (179776 = 424²).

The spelling of 17973145 in words is "seventeen million, nine hundred seventy-three thousand, one hundred forty-five".