100664281 has 2 divisors, whose sum is σ = 100664282. Its totient is φ = 100664280.

The previous prime is 100664279. The next prime is 100664287. The reversal of 100664281 is 182466001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50537881 + 50126400 = 7109^2 + 7080^2 .

It is an emirp because it is prime and its reverse (182466001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100664281 - 2¹ = 100664279 is a prime.

It is a super-2 number, since 2×100664281² = 20266594938493922, which contains 22 as substring.

Together with 100664279, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100664287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50332140 + 50332141.

It is an arithmetic number, because the mean of its divisors is an integer number (50332141).

Almost surely, 2^100664281 is an apocalyptic number.

It is an amenable number.

100664281 is a deficient number, since it is larger than the sum of its proper divisors (1).

100664281 is an equidigital number, since it uses as much as digits as its factorization.

100664281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 100664281 is about 10033.1590737913. The cubic root of 100664281 is about 465.1843890464.

The spelling of 100664281 in words is "one hundred million, six hundred sixty-four thousand, two hundred eighty-one".