208902526981 has 2 divisors, whose sum is σ = 208902526982. Its totient is φ = 208902526980.

The previous prime is 208902526957. The next prime is 208902527033. The reversal of 208902526981 is 189625209802.

It is an a-pointer prime, because the next prime (208902527033) can be obtained adding 208902526981 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203162040225 + 5740486756 = 450735^2 + 75766^2 .

It is a cyclic number.

It is not a de Polignac number, because 208902526981 - 2¹⁷ = 208902395909 is a prime.

It is a super-2 number, since 2×208902526981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208902526381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104451263490 + 104451263491.

It is an arithmetic number, because the mean of its divisors is an integer number (104451263491).

Almost surely, 2^208902526981 is an apocalyptic number.

It is an amenable number.

208902526981 is a deficient number, since it is larger than the sum of its proper divisors (1).

208902526981 is an equidigital number, since it uses as much as digits as its factorization.

208902526981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 208902526981 in words is "two hundred eight billion, nine hundred two million, five hundred twenty-six thousand, nine hundred eighty-one".