208193983 has 4 divisors (see below), whose sum is σ = 209344408. Its totient is φ = 207043560.

The previous prime is 208193971. The next prime is 208193989. The reversal of 208193983 is 389391802.

It is a happy number.

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 208193983 - 2⁹ = 208193471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208193989) 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, 574941 + ... + 575302.

It is an arithmetic number, because the mean of its divisors is an integer number (52336102).

Almost surely, 2^208193983 is an apocalyptic number.

208193983 is a deficient number, since it is larger than the sum of its proper divisors (1150425).

208193983 is a wasteful number, since it uses less digits than its factorization.

208193983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150424.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 208193983 is about 14428.9286851103. The cubic root of 208193983 is about 592.6833467963.

The spelling of 208193983 in words is "two hundred eight million, one hundred ninety-three thousand, nine hundred eighty-three".