208077005 has 6 divisors (see below), whose sum is σ = 249731118. Its totient is φ = 166435800.

The previous prime is 208076977. The next prime is 208077013. The reversal of 208077005 is 500770802.

It can be written as a sum of positive squares in only one way, i.e., 166461604 + 41615401 = 12902^2 + 6451^2 .

It is not a de Polignac number, because 208077005 - 2¹⁰ = 208075981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29030 + ... + 35480.

It is an arithmetic number, because the mean of its divisors is an integer number (41621853).

Almost surely, 2^208077005 is an apocalyptic number.

It is an amenable number.

208077005 is a deficient number, since it is larger than the sum of its proper divisors (41654113).

208077005 is an frugal number, since it uses more digits than its factorization.

208077005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12907 (or 6456 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 208077005 is about 14424.8745228511. The cubic root of 208077005 is about 592.5723222915.

Multiplying 208077005 by its product of nonzero digits (3920), we get a square (815661859600 = 903140²).

The spelling of 208077005 in words is "two hundred eight million, seventy-seven thousand, five".