10909091 has 4 divisors (see below), whose sum is σ = 10948752. Its totient is φ = 10869432.

The previous prime is 10909081. The next prime is 10909099. The reversal of 10909091 is 19090901.

10909091 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19090901 = 887 ⋅21523.

It is a cyclic number.

It is not a de Polignac number, because 10909091 - 2²² = 6714787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10909099) 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 3 ways as a sum of consecutive naturals, for example, 19415 + ... + 19968.

It is an arithmetic number, because the mean of its divisors is an integer number (2737188).

Almost surely, 2^10909091 is an apocalyptic number.

10909091 is a deficient number, since it is larger than the sum of its proper divisors (39661).

10909091 is an equidigital number, since it uses as much as digits as its factorization.

10909091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39660.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 10909091 is about 3302.8913091411. The cubic root of 10909091 is about 221.7836474021.

Adding to 10909091 its reverse (19090901), we get a palindrome (29999992).

The spelling of 10909091 in words is "ten million, nine hundred nine thousand, ninety-one".