11722611 has 4 divisors (see below), whose sum is σ = 15630152. Its totient is φ = 7815072.

The previous prime is 11722591. The next prime is 11722621. The reversal of 11722611 is 11622711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11622711 = 3 ⋅3874237.

It is not a de Polignac number, because 11722611 - 2¹⁰ = 11721587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11722621) 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, 1953766 + ... + 1953771.

It is an arithmetic number, because the mean of its divisors is an integer number (3907538).

Almost surely, 2^11722611 is an apocalyptic number.

11722611 is a deficient number, since it is larger than the sum of its proper divisors (3907541).

11722611 is an equidigital number, since it uses as much as digits as its factorization.

11722611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907540.

The product of its digits is 168, while the sum is 21.

The square root of 11722611 is about 3423.8298731099. The cubic root of 11722611 is about 227.1650167964.

The spelling of 11722611 in words is "eleven million, seven hundred twenty-two thousand, six hundred eleven".