34855981 has 2 divisors, whose sum is σ = 34855982. Its totient is φ = 34855980.

The previous prime is 34855979. The next prime is 34856011. The reversal of 34855981 is 18955843.

34855981 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., 34703881 + 152100 = 5891^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 34855981 - 2¹ = 34855979 is a prime.

It is a super-2 number, since 2×34855981² = 2429878822944722, which contains 22 as substring.

Together with 34855979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34855081) 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, 17427990 + 17427991.

It is an arithmetic number, because the mean of its divisors is an integer number (17427991).

Almost surely, 2^34855981 is an apocalyptic number.

It is an amenable number.

34855981 is a deficient number, since it is larger than the sum of its proper divisors (1).

34855981 is an equidigital number, since it uses as much as digits as its factorization.

34855981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 43.

The square root of 34855981 is about 5903.8954089652. The cubic root of 34855981 is about 326.6573516479.

The spelling of 34855981 in words is "thirty-four million, eight hundred fifty-five thousand, nine hundred eighty-one".