16971923 has 4 divisors (see below), whose sum is σ = 17176488. Its totient is φ = 16767360.

The previous prime is 16971919. The next prime is 16971949. The reversal of 16971923 is 32917961.

It is a happy number.

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 16971923 - 2² = 16971919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16971223) 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 3 ways as a sum of consecutive naturals, for example, 102158 + ... + 102323.

It is an arithmetic number, because the mean of its divisors is an integer number (4294122).

Almost surely, 2^16971923 is an apocalyptic number.

16971923 is a deficient number, since it is larger than the sum of its proper divisors (204565).

16971923 is an equidigital number, since it uses as much as digits as its factorization.

16971923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204564.

The product of its digits is 20412, while the sum is 38.

The square root of 16971923 is about 4119.6993822365. The cubic root of 16971923 is about 256.9865244490.

The spelling of 16971923 in words is "sixteen million, nine hundred seventy-one thousand, nine hundred twenty-three".