34128749 has 2 divisors, whose sum is σ = 34128750. Its totient is φ = 34128748.

The previous prime is 34128719. The next prime is 34128751. The reversal of 34128749 is 94782143.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33431524 + 697225 = 5782^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 34128749 - 2¹⁶ = 34063213 is a prime.

Together with 34128751, 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 (34128719) 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, 17064374 + 17064375.

It is an arithmetic number, because the mean of its divisors is an integer number (17064375).

Almost surely, 2^34128749 is an apocalyptic number.

It is an amenable number.

34128749 is a deficient number, since it is larger than the sum of its proper divisors (1).

34128749 is an equidigital number, since it uses as much as digits as its factorization.

34128749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 34128749 is about 5841.9815987386. The cubic root of 34128749 is about 324.3695834672.

The spelling of 34128749 in words is "thirty-four million, one hundred twenty-eight thousand, seven hundred forty-nine".