11075991 has 8 divisors (see below), whose sum is σ = 14784240. Its totient is φ = 7375872.

The previous prime is 11075989. The next prime is 11076007. The reversal of 11075991 is 19957011.

It is a happy number.

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

It is not a de Polignac number, because 11075991 - 2¹ = 11075989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11075951) 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, 2775 + ... + 5463.

It is an arithmetic number, because the mean of its divisors is an integer number (1848030).

Almost surely, 2^11075991 is an apocalyptic number.

11075991 is a deficient number, since it is larger than the sum of its proper divisors (3708249).

11075991 is a wasteful number, since it uses less digits than its factorization.

11075991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065.

The product of its (nonzero) digits is 2835, while the sum is 33.

The square root of 11075991 is about 3328.0611472748. The cubic root of 11075991 is about 222.9089629542.

The spelling of 11075991 in words is "eleven million, seventy-five thousand, nine hundred ninety-one".