209423404 has 12 divisors (see below), whose sum is σ = 376396384. Its totient is φ = 101881584.

The previous prime is 209423387. The next prime is 209423407. The reversal of 209423404 is 404324902.

209423404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (209423407) 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, 707364 + ... + 707659.

Almost surely, 2^209423404 is an apocalyptic number.

It is an amenable number.

209423404 is a deficient number, since it is larger than the sum of its proper divisors (166972980).

209423404 is a wasteful number, since it uses less digits than its factorization.

209423404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415064 (or 1415062 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 209423404 is about 14471.4686193213. The cubic root of 209423404 is about 593.8476900166.

The spelling of 209423404 in words is "two hundred nine million, four hundred twenty-three thousand, four hundred four".