209354542 has 8 divisors (see below), whose sum is σ = 314094600. Its totient is φ = 104656344.

The previous prime is 209354539. The next prime is 209354549. The reversal of 209354542 is 245453902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 209354498 and 209354507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209354549) 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, 10209 + ... + 22867.

It is an arithmetic number, because the mean of its divisors is an integer number (39261825).

Almost surely, 2^209354542 is an apocalyptic number.

209354542 is a deficient number, since it is larger than the sum of its proper divisors (104740058).

209354542 is a wasteful number, since it uses less digits than its factorization.

209354542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20930.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 209354542 is about 14469.0891904086. The cubic root of 209354542 is about 593.7825937860.

The spelling of 209354542 in words is "two hundred nine million, three hundred fifty-four thousand, five hundred forty-two".