8650981 has 2 divisors, whose sum is σ = 8650982. Its totient is φ = 8650980.

The previous prime is 8650979. The next prime is 8650997. The reversal of 8650981 is 1890568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6548481 + 2102500 = 2559^2 + 1450^2 .

It is a cyclic number.

It is not a de Polignac number, because 8650981 - 2¹ = 8650979 is a prime.

It is a super-2 number, since 2×8650981² = 149678944524722, which contains 22 as substring.

Together with 8650979, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8650981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8654981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4325490 + 4325491.

It is an arithmetic number, because the mean of its divisors is an integer number (4325491).

Almost surely, 2^8650981 is an apocalyptic number.

It is an amenable number.

8650981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8650981 is an equidigital number, since it uses as much as digits as its factorization.

8650981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 8650981 is about 2941.2550042456. The cubic root of 8650981 is about 205.2840084924.

The spelling of 8650981 in words is "eight million, six hundred fifty thousand, nine hundred eighty-one".