35816981 has 2 divisors, whose sum is σ = 35816982. Its totient is φ = 35816980.

The previous prime is 35816971. The next prime is 35816983. The reversal of 35816981 is 18961853.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25150225 + 10666756 = 5015^2 + 3266^2 .

It is a cyclic number.

It is not a de Polignac number, because 35816981 - 2⁶ = 35816917 is a prime.

It is a super-2 number, since 2×35816981² = 2565712255908722, which contains 22 as substring.

Together with 35816983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35816983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17908490 + 17908491.

It is an arithmetic number, because the mean of its divisors is an integer number (17908491).

Almost surely, 2^35816981 is an apocalyptic number.

It is an amenable number.

35816981 is a deficient number, since it is larger than the sum of its proper divisors (1).

35816981 is an equidigital number, since it uses as much as digits as its factorization.

35816981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 35816981 is about 5984.7289830033. The cubic root of 35816981 is about 329.6322226574.

The spelling of 35816981 in words is "thirty-five million, eight hundred sixteen thousand, nine hundred eighty-one".