11809361 has 4 divisors (see below), whose sum is σ = 12060672. Its totient is φ = 11558052.

The previous prime is 11809333. The next prime is 11809379. The reversal of 11809361 is 16390811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11809361 - 2¹⁰ = 11808337 is a prime.

It is a super-2 number, since 2×11809361² = 278922014456642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11809331) 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, 125585 + ... + 125678.

It is an arithmetic number, because the mean of its divisors is an integer number (3015168).

Almost surely, 2^11809361 is an apocalyptic number.

It is an amenable number.

11809361 is a deficient number, since it is larger than the sum of its proper divisors (251311).

11809361 is an equidigital number, since it uses as much as digits as its factorization.

11809361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251310.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 11809361 is about 3436.4750835704. The cubic root of 11809361 is about 227.7239978701.

The spelling of 11809361 in words is "eleven million, eight hundred nine thousand, three hundred sixty-one".