34878409 has 2 divisors, whose sum is σ = 34878410. Its totient is φ = 34878408.

The previous prime is 34878377. The next prime is 34878449. The reversal of 34878409 is 90487843.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33872400 + 1006009 = 5820^2 + 1003^2 .

It is an emirp because it is prime and its reverse (90487843) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34878409 - 2⁵ = 34878377 is a prime.

It is not a weakly prime, because it can be changed into another prime (34878449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17439204 + 17439205.

It is an arithmetic number, because the mean of its divisors is an integer number (17439205).

Almost surely, 2^34878409 is an apocalyptic number.

It is an amenable number.

34878409 is a deficient number, since it is larger than the sum of its proper divisors (1).

34878409 is an equidigital number, since it uses as much as digits as its factorization.

34878409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 34878409 is about 5905.7945274112. The cubic root of 34878409 is about 326.7273989308.

The spelling of 34878409 in words is "thirty-four million, eight hundred seventy-eight thousand, four hundred nine".