208542871 has 2 divisors, whose sum is σ = 208542872. Its totient is φ = 208542870.

The previous prime is 208542847. The next prime is 208542877. The reversal of 208542871 is 178245802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208542871 - 2⁵ = 208542839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208542871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208542877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104271435 + 104271436.

It is an arithmetic number, because the mean of its divisors is an integer number (104271436).

Almost surely, 2^208542871 is an apocalyptic number.

208542871 is a deficient number, since it is larger than the sum of its proper divisors (1).

208542871 is an equidigital number, since it uses as much as digits as its factorization.

208542871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 208542871 is about 14441.0135032137. The cubic root of 208542871 is about 593.0142316530.

The spelling of 208542871 in words is "two hundred eight million, five hundred forty-two thousand, eight hundred seventy-one".