209019000239 has 4 divisors (see below), whose sum is σ = 238878857424. Its totient is φ = 179159143056.

The previous prime is 209019000217. The next prime is 209019000241. The reversal of 209019000239 is 932000910902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 209019000239 - 2⁸ = 209018999983 is a prime.

It is a super-2 number, since 2×209019000239² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 209019000199 and 209019000208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209019000259) 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, 14929928582 + ... + 14929928595.

It is an arithmetic number, because the mean of its divisors is an integer number (59719714356).

Almost surely, 2^209019000239 is an apocalyptic number.

209019000239 is a deficient number, since it is larger than the sum of its proper divisors (29859857185).

209019000239 is an equidigital number, since it uses as much as digits as its factorization.

209019000239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29859857184.

The product of its (nonzero) digits is 8748, while the sum is 35.

The spelling of 209019000239 in words is "two hundred nine billion, nineteen million, two hundred thirty-nine", and thus it is an aban number.