208393839 has 12 divisors (see below), whose sum is σ = 301528656. Its totient is φ = 138691392.

The previous prime is 208393831. The next prime is 208393891. The reversal of 208393839 is 938393802.

It is not a de Polignac number, because 208393839 - 2³ = 208393831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 208393794 and 208393803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208393831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14187 + ... + 24860.

It is an arithmetic number, because the mean of its divisors is an integer number (25127388).

Almost surely, 2^208393839 is an apocalyptic number.

208393839 is a deficient number, since it is larger than the sum of its proper divisors (93134817).

208393839 is a wasteful number, since it uses less digits than its factorization.

208393839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39646 (or 39643 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 208393839 is about 14435.8525553567. The cubic root of 208393839 is about 592.8729351135.

The spelling of 208393839 in words is "two hundred eight million, three hundred ninety-three thousand, eight hundred thirty-nine".