208725952889 has 4 divisors (see below), whose sum is σ = 208731161424. Its totient is φ = 208720744356.

The previous prime is 208725952871. The next prime is 208725952907. The reversal of 208725952889 is 988259527802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (208725952871) and next prime (208725952907).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208725952889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208725952849) 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, 2543687 + ... + 2624460.

It is an arithmetic number, because the mean of its divisors is an integer number (52182790356).

Almost surely, 2^208725952889 is an apocalyptic number.

It is an amenable number.

208725952889 is a deficient number, since it is larger than the sum of its proper divisors (5208535).

208725952889 is an equidigital number, since it uses as much as digits as its factorization.

208725952889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5208534.

The product of its (nonzero) digits is 58060800, while the sum is 65.

The spelling of 208725952889 in words is "two hundred eight billion, seven hundred twenty-five million, nine hundred fifty-two thousand, eight hundred eighty-nine".