10991441 has 8 divisors (see below), whose sum is σ = 11210304. Its totient is φ = 10774800.

The previous prime is 10991429. The next prime is 10991459. The reversal of 10991441 is 14419901.

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 10991441 - 2²² = 6797137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10991471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12095 + ... + 12971.

It is an arithmetic number, because the mean of its divisors is an integer number (1401288).

Almost surely, 2^10991441 is an apocalyptic number.

It is an amenable number.

10991441 is a deficient number, since it is larger than the sum of its proper divisors (218863).

10991441 is an equidigital number, since it uses as much as digits as its factorization.

10991441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 10991441 is about 3315.3342214624. The cubic root of 10991441 is about 222.3403121335.

The spelling of 10991441 in words is "ten million, nine hundred ninety-one thousand, four hundred forty-one".