11722667 has 4 divisors (see below), whose sum is σ = 12788376. Its totient is φ = 10656960.

The previous prime is 11722661. The next prime is 11722691. The reversal of 11722667 is 76622711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76622711 = 11 ⋅6965701.

It is a cyclic number.

It is not a de Polignac number, because 11722667 - 2¹⁴ = 11706283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11722661) 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, 532838 + ... + 532859.

It is an arithmetic number, because the mean of its divisors is an integer number (3197094).

Almost surely, 2^11722667 is an apocalyptic number.

11722667 is a deficient number, since it is larger than the sum of its proper divisors (1065709).

11722667 is a wasteful number, since it uses less digits than its factorization.

11722667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065708.

The product of its digits is 7056, while the sum is 32.

The square root of 11722667 is about 3423.8380510766. The cubic root of 11722667 is about 227.1653785253.

The spelling of 11722667 in words is "eleven million, seven hundred twenty-two thousand, six hundred sixty-seven".