208989000309 has 8 divisors (see below), whose sum is σ = 278655011712. Its totient is φ = 139324494560.

The previous prime is 208989000301. The next prime is 208989000313. The reversal of 208989000309 is 903000989802.

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

It is a cyclic number.

It is not a de Polignac number, because 208989000309 - 2³ = 208989000301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208989000301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1732 + ... + 646514.

It is an arithmetic number, because the mean of its divisors is an integer number (34831876464).

Almost surely, 2^208989000309 is an apocalyptic number.

It is an amenable number.

208989000309 is a deficient number, since it is larger than the sum of its proper divisors (69666011403).

208989000309 is a wasteful number, since it uses less digits than its factorization.

208989000309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752827.

The product of its (nonzero) digits is 279936, while the sum is 48.

The spelling of 208989000309 in words is "two hundred eight billion, nine hundred eighty-nine million, three hundred nine", and thus it is an aban number.