11721669 has 8 divisors (see below), whose sum is σ = 15650880. Its totient is φ = 7803456.

The previous prime is 11721667. The next prime is 11721673. The reversal of 11721669 is 96612711.

11721669 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11721669 - 2¹ = 11721667 is a prime.

It is a super-2 number, since 2×11721669² = 274795048291122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11721667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189 + ... + 4845.

It is an arithmetic number, because the mean of its divisors is an integer number (1956360).

Almost surely, 2^11721669 is an apocalyptic number.

It is an amenable number.

11721669 is a deficient number, since it is larger than the sum of its proper divisors (3929211).

11721669 is an equidigital number, since it uses as much as digits as its factorization.

11721669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499.

The product of its digits is 4536, while the sum is 33.

The square root of 11721669 is about 3423.6923050999. The cubic root of 11721669 is about 227.1589318273.

The spelling of 11721669 in words is "eleven million, seven hundred twenty-one thousand, six hundred sixty-nine".