209794494 has 64 divisors (see below), whose sum is σ = 524966400. Its totient is φ = 54414720.

The previous prime is 209794493. The next prime is 209794513. The reversal of 209794494 is 494497902.

209794494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209794493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30157 + ... + 36455.

It is an arithmetic number, because the mean of its divisors is an integer number (8202600).

Almost surely, 2^209794494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209794494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262483200).

209794494 is an abundant number, since it is smaller than the sum of its proper divisors (315171906).

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

209794494 is a wasteful number, since it uses less digits than its factorization.

209794494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 209794494 is about 14484.2843799754. The cubic root of 209794494 is about 594.1982412606.

The spelling of 209794494 in words is "two hundred nine million, seven hundred ninety-four thousand, four hundred ninety-four".