208880857 has 2 divisors, whose sum is σ = 208880858. Its totient is φ = 208880856.

The previous prime is 208880809. The next prime is 208880891. The reversal of 208880857 is 758088802.

208880857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153363456 + 55517401 = 12384^2 + 7451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208880857 is a prime.

It is not a weakly prime, because it can be changed into another prime (208880057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104440428 + 104440429.

It is an arithmetic number, because the mean of its divisors is an integer number (104440429).

Almost surely, 2^208880857 is an apocalyptic number.

It is an amenable number.

208880857 is a deficient number, since it is larger than the sum of its proper divisors (1).

208880857 is an equidigital number, since it uses as much as digits as its factorization.

208880857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 286720, while the sum is 46.

The square root of 208880857 is about 14452.7110605588. The cubic root of 208880857 is about 593.3344253301.

The spelling of 208880857 in words is "two hundred eight million, eight hundred eighty thousand, eight hundred fifty-seven".