208082645 has 4 divisors (see below), whose sum is σ = 249699180. Its totient is φ = 166466112.

The previous prime is 208082639. The next prime is 208082647. The reversal of 208082645 is 546280802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29833444 + 178249201 = 5462^2 + 13351^2 .

It is a cyclic number.

It is not a de Polignac number, because 208082645 - 2¹⁶ = 208017109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208082647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20808260 + ... + 20808269.

It is an arithmetic number, because the mean of its divisors is an integer number (62424795).

Almost surely, 2^208082645 is an apocalyptic number.

It is an amenable number.

208082645 is a deficient number, since it is larger than the sum of its proper divisors (41616535).

208082645 is an equidigital number, since it uses as much as digits as its factorization.

208082645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41616534.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 208082645 is about 14425.0700171611. The cubic root of 208082645 is about 592.5776762032.

The spelling of 208082645 in words is "two hundred eight million, eighty-two thousand, six hundred forty-five".