34978861 has 2 divisors, whose sum is σ = 34978862. Its totient is φ = 34978860.

The previous prime is 34978859. The next prime is 34978871. The reversal of 34978861 is 16887943.

It is a happy number.

34978861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is the 2415-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25948836 + 9030025 = 5094^2 + 3005^2 .

It is a cyclic number.

It is not a de Polignac number, because 34978861 - 2¹ = 34978859 is a prime.

Together with 34978859, 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 (34978841) 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, 17489430 + 17489431.

It is an arithmetic number, because the mean of its divisors is an integer number (17489431).

Almost surely, 2^34978861 is an apocalyptic number.

It is an amenable number.

34978861 is a deficient number, since it is larger than the sum of its proper divisors (1).

34978861 is an equidigital number, since it uses as much as digits as its factorization.

34978861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 34978861 is about 5914.2929416795. The cubic root of 34978861 is about 327.0407634033.

The spelling of 34978861 in words is "thirty-four million, nine hundred seventy-eight thousand, eight hundred sixty-one".