11137661 has 2 divisors, whose sum is σ = 11137662. Its totient is φ = 11137660.

The previous prime is 11137631. The next prime is 11137663. The reversal of 11137661 is 16673111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8352100 + 2785561 = 2890^2 + 1669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11137661 is a prime.

Together with 11137663, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11137661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11137663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5568830 + 5568831.

It is an arithmetic number, because the mean of its divisors is an integer number (5568831).

Almost surely, 2^11137661 is an apocalyptic number.

It is an amenable number.

11137661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11137661 is an equidigital number, since it uses as much as digits as its factorization.

11137661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 26.

The square root of 11137661 is about 3337.3134404787. The cubic root of 11137661 is about 223.3219090218.

The spelling of 11137661 in words is "eleven million, one hundred thirty-seven thousand, six hundred sixty-one".