209002039 has 2 divisors, whose sum is σ = 209002040. Its totient is φ = 209002038.

The previous prime is 209002037. The next prime is 209002049. The reversal of 209002039 is 930200902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 209002039 - 2¹ = 209002037 is a prime.

Together with 209002037, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209002037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104501019 + 104501020.

It is an arithmetic number, because the mean of its divisors is an integer number (104501020).

Almost surely, 2^209002039 is an apocalyptic number.

209002039 is a deficient number, since it is larger than the sum of its proper divisors (1).

209002039 is an equidigital number, since it uses as much as digits as its factorization.

209002039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 209002039 is about 14456.9028149186. The cubic root of 209002039 is about 593.4491439203.

The spelling of 209002039 in words is "two hundred nine million, two thousand, thirty-nine".