209473430 has 16 divisors (see below), whose sum is σ = 382364064. Its totient is φ = 82608960.

The previous prime is 209473421. The next prime is 209473441. The reversal of 209473430 is 34374902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146807 + ... + 148226.

It is an arithmetic number, because the mean of its divisors is an integer number (23897754).

Almost surely, 2^209473430 is an apocalyptic number.

209473430 is a deficient number, since it is larger than the sum of its proper divisors (172890634).

209473430 is a wasteful number, since it uses less digits than its factorization.

209473430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295111.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 209473430 is about 14473.1969516068. The cubic root of 209473430 is about 593.8949713596.

The spelling of 209473430 in words is "two hundred nine million, four hundred seventy-three thousand, four hundred thirty".