209429696 has 28 divisors (see below), whose sum is σ = 474957648. Its totient is φ = 89755392.

The previous prime is 209429687. The next prime is 209429699. The reversal of 209429696 is 696924902.

It is a tau number, because it is divible by the number of its divisors (28).

It is a self number, because there is not a number n which added to its sum of digits gives 209429696.

It is not an unprimeable number, because it can be changed into a prime (209429699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233291 + ... + 234186.

Almost surely, 2^209429696 is an apocalyptic number.

It is an amenable number.

209429696 is an abundant number, since it is smaller than the sum of its proper divisors (265527952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209429696 is an equidigital number, since it uses as much as digits as its factorization.

209429696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467496 (or 467486 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 209429696 is about 14471.6860109664. The cubic root of 209429696 is about 593.8536372224.

The spelling of 209429696 in words is "two hundred nine million, four hundred twenty-nine thousand, six hundred ninety-six".