34991209 has 8 divisors (see below), whose sum is σ = 38297952. Its totient is φ = 31705440.

The previous prime is 34991191. The next prime is 34991213. The reversal of 34991209 is 90219943.

34991209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 34991209 - 2²³ = 26602601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (34991239) 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 in 7 ways as a sum of consecutive naturals, for example, 1639 + ... + 8524.

It is an arithmetic number, because the mean of its divisors is an integer number (4787244).

Almost surely, 2^34991209 is an apocalyptic number.

It is an amenable number.

34991209 is a deficient number, since it is larger than the sum of its proper divisors (3306743).

34991209 is a wasteful number, since it uses less digits than its factorization.

34991209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10487.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 34991209 is about 5915.3367613349. The cubic root of 34991209 is about 327.0792421124.

The spelling of 34991209 in words is "thirty-four million, nine hundred ninety-one thousand, two hundred nine".