10991795 has 4 divisors (see below), whose sum is σ = 13190160. Its totient is φ = 8793432.

The previous prime is 10991791. The next prime is 10991797. The reversal of 10991795 is 59719901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59719901 = 109 ⋅547889.

It is a cyclic number.

It is not a de Polignac number, because 10991795 - 2² = 10991791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10991791) 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, 1099175 + ... + 1099184.

It is an arithmetic number, because the mean of its divisors is an integer number (3297540).

Almost surely, 2^10991795 is an apocalyptic number.

10991795 is a deficient number, since it is larger than the sum of its proper divisors (2198365).

10991795 is an equidigital number, since it uses as much as digits as its factorization.

10991795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198364.

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 10991795 is about 3315.3876093151. The cubic root of 10991795 is about 222.3426990703.

The spelling of 10991795 in words is "ten million, nine hundred ninety-one thousand, seven hundred ninety-five".