34543981 has 2 divisors, whose sum is σ = 34543982. Its totient is φ = 34543980.

The previous prime is 34543973. The next prime is 34544009. The reversal of 34543981 is 18934543.

34543981 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., 20331081 + 14212900 = 4509^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 34543981 - 2³ = 34543973 is a prime.

It is a super-2 number, since 2×34543981² = 2386573246656722, 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 34543981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34543961) 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, 17271990 + 17271991.

It is an arithmetic number, because the mean of its divisors is an integer number (17271991).

Almost surely, 2^34543981 is an apocalyptic number.

It is an amenable number.

34543981 is a deficient number, since it is larger than the sum of its proper divisors (1).

34543981 is an equidigital number, since it uses as much as digits as its factorization.

34543981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 34543981 is about 5877.4127811478. The cubic root of 34543981 is about 325.6797795287.

The spelling of 34543981 in words is "thirty-four million, five hundred forty-three thousand, nine hundred eighty-one".