102008981 has 2 divisors, whose sum is σ = 102008982. Its totient is φ = 102008980.

The previous prime is 102008969. The next prime is 102008989. The reversal of 102008981 is 189800201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92948881 + 9060100 = 9641^2 + 3010^2 .

It is a cyclic number.

It is not a de Polignac number, because 102008981 - 2⁶ = 102008917 is a prime.

It is a super-2 number, since 2×102008981² = 20811664409316722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102008989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51004490 + 51004491.

It is an arithmetic number, because the mean of its divisors is an integer number (51004491).

Almost surely, 2^102008981 is an apocalyptic number.

It is an amenable number.

102008981 is a deficient number, since it is larger than the sum of its proper divisors (1).

102008981 is an equidigital number, since it uses as much as digits as its factorization.

102008981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 102008981 is about 10099.9495543295. The cubic root of 102008981 is about 467.2465855652.

The spelling of 102008981 in words is "one hundred two million, eight thousand, nine hundred eighty-one".