209242694 has 4 divisors (see below), whose sum is σ = 313864044. Its totient is φ = 104621346.

The previous prime is 209242679. The next prime is 209242699. The reversal of 209242694 is 496242902.

209242694 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 496242902 = 2 ⋅248121451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209242699) 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 as a sum of consecutive naturals, namely, 52310672 + ... + 52310675.

It is an arithmetic number, because the mean of its divisors is an integer number (78466011).

Almost surely, 2^209242694 is an apocalyptic number.

209242694 is a deficient number, since it is larger than the sum of its proper divisors (104621350).

209242694 is a wasteful number, since it uses less digits than its factorization.

209242694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104621349.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 209242694 is about 14465.2236069824. The cubic root of 209242694 is about 593.6768318481.

The spelling of 209242694 in words is "two hundred nine million, two hundred forty-two thousand, six hundred ninety-four".