208994389 has 8 divisors (see below), whose sum is σ = 215241728. Its totient is φ = 202778640.

The previous prime is 208994371. The next prime is 208994407. The reversal of 208994389 is 983499802.

It is an interprime number because it is at equal distance from previous prime (208994371) and next prime (208994407).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208994389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208994309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5884 + ... + 21274.

It is an arithmetic number, because the mean of its divisors is an integer number (26905216).

Almost surely, 2^208994389 is an apocalyptic number.

It is an amenable number.

208994389 is a deficient number, since it is larger than the sum of its proper divisors (6247339).

208994389 is a wasteful number, since it uses less digits than its factorization.

208994389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15795.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The square root of 208994389 is about 14456.6382330056. The cubic root of 208994389 is about 593.4419032551.

The spelling of 208994389 in words is "two hundred eight million, nine hundred ninety-four thousand, three hundred eighty-nine".