208408042237 has 8 divisors (see below), whose sum is σ = 209021907456. Its totient is φ = 207795068112.

The previous prime is 208408042169. The next prime is 208408042243. The reversal of 208408042237 is 732240804802.

It is a happy number.

208408042237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 208408042237 - 2⁷ = 208408042109 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 208408042237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208408048237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247128 + ... + 691294.

It is an arithmetic number, because the mean of its divisors is an integer number (26127738432).

Almost surely, 2^208408042237 is an apocalyptic number.

It is an amenable number.

208408042237 is a deficient number, since it is larger than the sum of its proper divisors (613865219).

208408042237 is an equidigital number, since it uses as much as digits as its factorization.

208408042237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445547.

The product of its (nonzero) digits is 172032, while the sum is 40.

The spelling of 208408042237 in words is "two hundred eight billion, four hundred eight million, forty-two thousand, two hundred thirty-seven".