208949983 has 4 divisors (see below), whose sum is σ = 227945448. Its totient is φ = 189954520.

The previous prime is 208949977. The next prime is 208949987. The reversal of 208949983 is 389949802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208949983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 208949983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208949987) 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, 9497716 + ... + 9497737.

It is an arithmetic number, because the mean of its divisors is an integer number (56986362).

Almost surely, 2^208949983 is an apocalyptic number.

208949983 is a deficient number, since it is larger than the sum of its proper divisors (18995465).

208949983 is a wasteful number, since it uses less digits than its factorization.

208949983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18995464.

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

The square root of 208949983 is about 14455.1023171751. The cubic root of 208949983 is about 593.3998698335.

The spelling of 208949983 in words is "two hundred eight million, nine hundred forty-nine thousand, nine hundred eighty-three".