208978045 has 8 divisors (see below), whose sum is σ = 251227224. Its totient is φ = 166880064.

The previous prime is 208978001. The next prime is 208978051. The reversal of 208978045 is 540879802.

208978045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8415801 + 200562244 = 2901^2 + 14162^2 .

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 208978045 - 2¹⁵ = 208945277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208977992 and 208978010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34734 + ... + 40303.

It is an arithmetic number, because the mean of its divisors is an integer number (31403403).

Almost surely, 2^208978045 is an apocalyptic number.

It is an amenable number.

208978045 is a deficient number, since it is larger than the sum of its proper divisors (42249179).

208978045 is an equidigital number, since it uses as much as digits as its factorization.

208978045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75599.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 208978045 is about 14456.0729453057. The cubic root of 208978045 is about 593.4264331950.

The spelling of 208978045 in words is "two hundred eight million, nine hundred seventy-eight thousand, forty-five".