10909581 has 4 divisors (see below), whose sum is σ = 14546112. Its totient is φ = 7273052.

The previous prime is 10909579. The next prime is 10909583. The reversal of 10909581 is 18590901.

10909581 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (10909579) and next prime (10909583).

It is a cyclic number.

It is not a de Polignac number, because 10909581 - 2¹ = 10909579 is a prime.

It is a super-2 number, since 2×10909581² = 238037915191122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10909583) 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, 1818261 + ... + 1818266.

It is an arithmetic number, because the mean of its divisors is an integer number (3636528).

Almost surely, 2^10909581 is an apocalyptic number.

It is an amenable number.

10909581 is a deficient number, since it is larger than the sum of its proper divisors (3636531).

10909581 is an equidigital number, since it uses as much as digits as its factorization.

10909581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636530.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 10909581 is about 3302.9654857416. The cubic root of 10909581 is about 221.7869679465.

The spelling of 10909581 in words is "ten million, nine hundred nine thousand, five hundred eighty-one".