209423996 has 24 divisors (see below), whose sum is σ = 377032656. Its totient is φ = 101710080.

The previous prime is 209423987. The next prime is 209423999. The reversal of 209423996 is 699324902.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209423999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160820 + ... + 162116.

It is an arithmetic number, because the mean of its divisors is an integer number (15709694).

Almost surely, 2^209423996 is an apocalyptic number.

It is an amenable number.

209423996 is a deficient number, since it is larger than the sum of its proper divisors (167608660).

209423996 is a wasteful number, since it uses less digits than its factorization.

209423996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429 (or 2427 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 209423996 is about 14471.4890733469. The cubic root of 209423996 is about 593.8482495808.

The spelling of 209423996 in words is "two hundred nine million, four hundred twenty-three thousand, nine hundred ninety-six".