10991774 has 4 divisors (see below), whose sum is σ = 16487664. Its totient is φ = 5495886.

The previous prime is 10991753. The next prime is 10991777. The reversal of 10991774 is 47719901.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10991777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2747942 + ... + 2747945.

It is an arithmetic number, because the mean of its divisors is an integer number (4121916).

Almost surely, 2^10991774 is an apocalyptic number.

10991774 is a deficient number, since it is larger than the sum of its proper divisors (5495890).

10991774 is an equidigital number, since it uses as much as digits as its factorization.

10991774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5495889.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 10991774 is about 3315.3844422631. The cubic root of 10991774 is about 222.3425574738.

The spelling of 10991774 in words is "ten million, nine hundred ninety-one thousand, seven hundred seventy-four".