16863923 has 4 divisors (see below), whose sum is σ = 16893240. Its totient is φ = 16834608.

The previous prime is 16863901. The next prime is 16863941. The reversal of 16863923 is 32936861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32936861 = 19 ⋅1733519.

It is a cyclic number.

It is not a de Polignac number, because 16863923 - 2⁶ = 16863859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16863943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13778 + ... + 14951.

It is an arithmetic number, because the mean of its divisors is an integer number (4223310).

Almost surely, 2^16863923 is an apocalyptic number.

16863923 is a deficient number, since it is larger than the sum of its proper divisors (29317).

16863923 is an equidigital number, since it uses as much as digits as its factorization.

16863923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29316.

The product of its digits is 46656, while the sum is 38.

The square root of 16863923 is about 4106.5707104590. The cubic root of 16863923 is about 256.4402570399.

The spelling of 16863923 in words is "sixteen million, eight hundred sixty-three thousand, nine hundred twenty-three".