208420793 has 4 divisors (see below), whose sum is σ = 238195200. Its totient is φ = 178646388.

The previous prime is 208420789. The next prime is 208420819. The reversal of 208420793 is 397024802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 208420793 - 2² = 208420789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208420763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14887193 + ... + 14887206.

It is an arithmetic number, because the mean of its divisors is an integer number (59548800).

Almost surely, 2^208420793 is an apocalyptic number.

It is an amenable number.

208420793 is a deficient number, since it is larger than the sum of its proper divisors (29774407).

208420793 is an equidigital number, since it uses as much as digits as its factorization.

208420793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29774406.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 208420793 is about 14436.7861035620. The cubic root of 208420793 is about 592.8984950633.

The spelling of 208420793 in words is "two hundred eight million, four hundred twenty thousand, seven hundred ninety-three".