11722489 has 2 divisors, whose sum is σ = 11722490. Its totient is φ = 11722488.

The previous prime is 11722429. The next prime is 11722499. The reversal of 11722489 is 98422711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10530025 + 1192464 = 3245^2 + 1092^2 .

It is an emirp because it is prime and its reverse (98422711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11722489 is a prime.

It is not a weakly prime, because it can be changed into another prime (11722429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5861244 + 5861245.

It is an arithmetic number, because the mean of its divisors is an integer number (5861245).

Almost surely, 2^11722489 is an apocalyptic number.

It is an amenable number.

11722489 is a deficient number, since it is larger than the sum of its proper divisors (1).

11722489 is an equidigital number, since it uses as much as digits as its factorization.

11722489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 11722489 is about 3423.8120567578. The cubic root of 11722489 is about 227.1642287402.

It can be divided in two parts, 11 and 722489, that added together give a square (722500 = 850²).

The spelling of 11722489 in words is "eleven million, seven hundred twenty-two thousand, four hundred eighty-nine".