34009991 has 2 divisors, whose sum is σ = 34009992. Its totient is φ = 34009990.

The previous prime is 34009961. The next prime is 34010023. The reversal of 34009991 is 19990043.

34009991 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 (19990043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34009991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34009931) 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, 17004995 + 17004996.

It is an arithmetic number, because the mean of its divisors is an integer number (17004996).

Almost surely, 2^34009991 is an apocalyptic number.

34009991 is a deficient number, since it is larger than the sum of its proper divisors (1).

34009991 is an equidigital number, since it uses as much as digits as its factorization.

34009991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 34009991 is about 5831.8085530991. The cubic root of 34009991 is about 323.9929093352.

The spelling of 34009991 in words is "thirty-four million, nine thousand, nine hundred ninety-one".