11949791 has 4 divisors (see below), whose sum is σ = 13656912. Its totient is φ = 10242672.

The previous prime is 11949781. The next prime is 11949799. The reversal of 11949791 is 19794911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19794911 = 257 ⋅77023.

It is a cyclic number.

It is not a de Polignac number, because 11949791 - 2¹⁰ = 11948767 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 (11949799) 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, 853550 + ... + 853563.

It is an arithmetic number, because the mean of its divisors is an integer number (3414228).

Almost surely, 2^11949791 is an apocalyptic number.

11949791 is a deficient number, since it is larger than the sum of its proper divisors (1707121).

11949791 is an equidigital number, since it uses as much as digits as its factorization.

11949791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707120.

The product of its digits is 20412, while the sum is 41.

The square root of 11949791 is about 3456.8469737609. The cubic root of 11949791 is about 228.6230968203.

The spelling of 11949791 in words is "eleven million, nine hundred forty-nine thousand, seven hundred ninety-one".