34778981 has 2 divisors, whose sum is σ = 34778982. Its totient is φ = 34778980.

The previous prime is 34778941. The next prime is 34778983. The reversal of 34778981 is 18987743.

34778981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33166081 + 1612900 = 5759^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 34778981 - 2¹⁴ = 34762597 is a prime.

It is a super-2 number, since 2×34778981² = 2419155038796722, which contains 22 as substring.

Together with 34778983, 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 (34778983) 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, 17389490 + 17389491.

It is an arithmetic number, because the mean of its divisors is an integer number (17389491).

Almost surely, 2^34778981 is an apocalyptic number.

It is an amenable number.

34778981 is a deficient number, since it is larger than the sum of its proper divisors (1).

34778981 is an equidigital number, since it uses as much as digits as its factorization.

34778981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 34778981 is about 5897.3706853139. The cubic root of 34778981 is about 326.4166358073.

The spelling of 34778981 in words is "thirty-four million, seven hundred seventy-eight thousand, nine hundred eighty-one".