35812981 has 2 divisors, whose sum is σ = 35812982. Its totient is φ = 35812980.

The previous prime is 35812969. The next prime is 35813021. The reversal of 35812981 is 18921853.

35812981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35212356 + 600625 = 5934^2 + 775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-35812981 is a prime.

It is a super-2 number, since 2×35812981² = 2565139216212722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 35812981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35812901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17906490 + 17906491.

It is an arithmetic number, because the mean of its divisors is an integer number (17906491).

Almost surely, 2^35812981 is an apocalyptic number.

It is an amenable number.

35812981 is a deficient number, since it is larger than the sum of its proper divisors (1).

35812981 is an equidigital number, since it uses as much as digits as its factorization.

35812981 is an odious number, because the sum of its binary digits is odd.

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

The square root of 35812981 is about 5984.3947897845. The cubic root of 35812981 is about 329.6199512157.

The spelling of 35812981 in words is "thirty-five million, eight hundred twelve thousand, nine hundred eighty-one".