11982661 has 2 divisors, whose sum is σ = 11982662. Its totient is φ = 11982660.

The previous prime is 11982653. The next prime is 11982679. The reversal of 11982661 is 16628911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6604900 + 5377761 = 2570^2 + 2319^2 .

It is a cyclic number.

It is not a de Polignac number, because 11982661 - 2³ = 11982653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11982601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5991330 + 5991331.

It is an arithmetic number, because the mean of its divisors is an integer number (5991331).

Almost surely, 2^11982661 is an apocalyptic number.

It is an amenable number.

11982661 is a deficient number, since it is larger than the sum of its proper divisors (1).

11982661 is an equidigital number, since it uses as much as digits as its factorization.

11982661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 34.

The square root of 11982661 is about 3461.5980413676. The cubic root of 11982661 is about 228.8325275796.

The spelling of 11982661 in words is "eleven million, nine hundred eighty-two thousand, six hundred sixty-one".