208192137 has 16 divisors (see below), whose sum is σ = 287800128. Its totient is φ = 133771520.

The previous prime is 208192133. The next prime is 208192151. The reversal of 208192137 is 731291802.

It is not a de Polignac number, because 208192137 - 2² = 208192133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 208192098 and 208192107.

It is not an unprimeable number, because it can be changed into a prime (208192133) 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 15 ways as a sum of consecutive naturals, for example, 13 + ... + 20405.

It is an arithmetic number, because the mean of its divisors is an integer number (17987508).

Almost surely, 2^208192137 is an apocalyptic number.

It is an amenable number.

208192137 is a deficient number, since it is larger than the sum of its proper divisors (79607991).

208192137 is a wasteful number, since it uses less digits than its factorization.

208192137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20520.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 208192137 is about 14428.8647162554. The cubic root of 208192137 is about 592.6815950699.

The spelling of 208192137 in words is "two hundred eight million, one hundred ninety-two thousand, one hundred thirty-seven".