16978023 has 6 divisors (see below), whose sum is σ = 24523824. Its totient is φ = 11318676.

The previous prime is 16978009. The next prime is 16978033. The reversal of 16978023 is 32087961.

It is not a de Polignac number, because 16978023 - 2⁶ = 16977959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16978033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 943215 + ... + 943232.

It is an arithmetic number, because the mean of its divisors is an integer number (4087304).

Almost surely, 2^16978023 is an apocalyptic number.

16978023 is a deficient number, since it is larger than the sum of its proper divisors (7545801).

16978023 is a wasteful number, since it uses less digits than its factorization.

16978023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886453 (or 1886450 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 16978023 is about 4120.4396610071. The cubic root of 16978023 is about 257.0173092149.

The spelling of 16978023 in words is "sixteen million, nine hundred seventy-eight thousand, twenty-three".