11691051 has 8 divisors (see below), whose sum is σ = 15667200. Its totient is φ = 7754472.

The previous prime is 11691049. The next prime is 11691059. The reversal of 11691051 is 15019611.

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

It is not a de Polignac number, because 11691051 - 2¹ = 11691049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11691059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9195 + ... + 10388.

It is an arithmetic number, because the mean of its divisors is an integer number (1958400).

Almost surely, 2^11691051 is an apocalyptic number.

11691051 is a deficient number, since it is larger than the sum of its proper divisors (3976149).

11691051 is a wasteful number, since it uses less digits than its factorization.

11691051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19785.

The product of its (nonzero) digits is 270, while the sum is 24.

The square root of 11691051 is about 3419.2178930276. The cubic root of 11691051 is about 226.9609731920.

The spelling of 11691051 in words is "eleven million, six hundred ninety-one thousand, fifty-one".