11663791 has 6 divisors (see below), whose sum is σ = 11762520. Its totient is φ = 11565828.

The previous prime is 11663731. The next prime is 11663837. The reversal of 11663791 is 19736611.

It is not a de Polignac number, because 11663791 - 2¹⁹ = 11139503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26350 + ... + 26788.

It is an arithmetic number, because the mean of its divisors is an integer number (1960420).

Almost surely, 2^11663791 is an apocalyptic number.

11663791 is a deficient number, since it is larger than the sum of its proper divisors (98729).

11663791 is an frugal number, since it uses more digits than its factorization.

11663791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 602 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 11663791 is about 3415.2292748804. The cubic root of 11663791 is about 226.7844344282.

The spelling of 11663791 in words is "eleven million, six hundred sixty-three thousand, seven hundred ninety-one".