209389052 has 6 divisors (see below), whose sum is σ = 366430848. Its totient is φ = 104694524.

The previous prime is 209389013. The next prime is 209389057. The reversal of 209389052 is 250983902.

It is a junction number, because it is equal to n+sod(n) for n = 209388997 and 209389015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209389057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26173628 + ... + 26173635.

It is an arithmetic number, because the mean of its divisors is an integer number (61071808).

Almost surely, 2^209389052 is an apocalyptic number.

It is an amenable number.

209389052 is a deficient number, since it is larger than the sum of its proper divisors (157041796).

209389052 is a wasteful number, since it uses less digits than its factorization.

209389052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52347267 (or 52347265 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 209389052 is about 14470.2816835057. The cubic root of 209389052 is about 593.8152183651.

The spelling of 209389052 in words is "two hundred nine million, three hundred eighty-nine thousand, fifty-two".