34645991 has 2 divisors, whose sum is σ = 34645992. Its totient is φ = 34645990.

The previous prime is 34645969. The next prime is 34645993. The reversal of 34645991 is 19954643.

34645991 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 is an emirp because it is prime and its reverse (19954643) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34645991 - 2¹⁴ = 34629607 is a prime.

Together with 34645993, 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 (34645993) 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, 17322995 + 17322996.

It is an arithmetic number, because the mean of its divisors is an integer number (17322996).

Almost surely, 2^34645991 is an apocalyptic number.

34645991 is a deficient number, since it is larger than the sum of its proper divisors (1).

34645991 is an equidigital number, since it uses as much as digits as its factorization.

34645991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 34645991 is about 5886.0845219891. The cubic root of 34645991 is about 326.0000470473. Note that the first 4 decimals are identical.

The spelling of 34645991 in words is "thirty-four million, six hundred forty-five thousand, nine hundred ninety-one".