209289054 has 32 divisors (see below), whose sum is σ = 452783520. Its totient is φ = 64109952.

The previous prime is 209289053. The next prime is 209289061. The reversal of 209289054 is 450982902.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209289053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12004 + ... + 23720.

It is an arithmetic number, because the mean of its divisors is an integer number (14149485).

Almost surely, 2^209289054 is an apocalyptic number.

209289054 is an abundant number, since it is smaller than the sum of its proper divisors (243494466).

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

209289054 is a wasteful number, since it uses less digits than its factorization.

209289054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11964.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 209289054 is about 14466.8259822257. The cubic root of 209289054 is about 593.7206738018.

The spelling of 209289054 in words is "two hundred nine million, two hundred eighty-nine thousand, fifty-four".