208091079 has 32 divisors (see below), whose sum is σ = 357603840. Its totient is φ = 117127296.

The previous prime is 208091077. The next prime is 208091083. The reversal of 208091079 is 970190802.

It is a happy number.

It is not a de Polignac number, because 208091079 - 2¹ = 208091077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208091077) 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 31 ways as a sum of consecutive naturals, for example, 4447 + ... + 20879.

It is an arithmetic number, because the mean of its divisors is an integer number (11175120).

Almost surely, 2^208091079 is an apocalyptic number.

208091079 is a deficient number, since it is larger than the sum of its proper divisors (149512761).

208091079 is a wasteful number, since it uses less digits than its factorization.

208091079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16516 (or 16510 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 208091079 is about 14425.3623524680. The cubic root of 208091079 is about 592.5856822090.

The spelling of 208091079 in words is "two hundred eight million, ninety-one thousand, seventy-nine".