10908991 has 4 divisors (see below), whose sum is σ = 10921392. Its totient is φ = 10896592.

The previous prime is 10908979. The next prime is 10909001. The reversal of 10908991 is 19980901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19980901 = 3989 ⋅5009.

It is a cyclic number.

It is not a de Polignac number, because 10908991 - 2⁹ = 10908479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10908991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10908791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4771 + ... + 6676.

It is an arithmetic number, because the mean of its divisors is an integer number (2730348).

Almost surely, 2^10908991 is an apocalyptic number.

10908991 is a deficient number, since it is larger than the sum of its proper divisors (12401).

10908991 is an equidigital number, since it uses as much as digits as its factorization.

10908991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12400.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 10908991 is about 3302.8761708547. The cubic root of 10908991 is about 221.7829697278.

The spelling of 10908991 in words is "ten million, nine hundred eight thousand, nine hundred ninety-one".