11662997 has 2 divisors, whose sum is σ = 11662998. Its totient is φ = 11662996.

The previous prime is 11662993. The next prime is 11663009. The reversal of 11662997 is 79926611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6345361 + 5317636 = 2519^2 + 2306^2 .

It is an emirp because it is prime and its reverse (79926611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11662997 - 2² = 11662993 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11662993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5831498 + 5831499.

It is an arithmetic number, because the mean of its divisors is an integer number (5831499).

Almost surely, 2^11662997 is an apocalyptic number.

It is an amenable number.

11662997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11662997 is an equidigital number, since it uses as much as digits as its factorization.

11662997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 11662997 is about 3415.1130288762. The cubic root of 11662997 is about 226.7792882762.

The spelling of 11662997 in words is "eleven million, six hundred sixty-two thousand, nine hundred ninety-seven".