34789991 has 2 divisors, whose sum is σ = 34789992. Its totient is φ = 34789990.

The previous prime is 34789981. The next prime is 34790009. The reversal of 34789991 is 19998743.

34789991 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 is an emirp because it is prime and its reverse (19998743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34789991 - 2⁶ = 34789927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34789901) 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, 17394995 + 17394996.

It is an arithmetic number, because the mean of its divisors is an integer number (17394996).

Almost surely, 2^34789991 is an apocalyptic number.

34789991 is a deficient number, since it is larger than the sum of its proper divisors (1).

34789991 is an equidigital number, since it uses as much as digits as its factorization.

34789991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 50.

The square root of 34789991 is about 5898.3040782923. The cubic root of 34789991 is about 326.4510768009.

The spelling of 34789991 in words is "thirty-four million, seven hundred eighty-nine thousand, nine hundred ninety-one".