11861659 has 2 divisors, whose sum is σ = 11861660. Its totient is φ = 11861658.

The previous prime is 11861639. The next prime is 11861671. The reversal of 11861659 is 95616811.

It is a strong prime.

It is an emirp because it is prime and its reverse (95616811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11861659 - 2⁵ = 11861627 is a prime.

It is not a weakly prime, because it can be changed into another prime (11861639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5930829 + 5930830.

It is an arithmetic number, because the mean of its divisors is an integer number (5930830).

Almost surely, 2^11861659 is an apocalyptic number.

11861659 is a deficient number, since it is larger than the sum of its proper divisors (1).

11861659 is an equidigital number, since it uses as much as digits as its factorization.

11861659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 37.

The square root of 11861659 is about 3444.0759283152. The cubic root of 11861659 is about 228.0596630051.

The spelling of 11861659 in words is "eleven million, eight hundred sixty-one thousand, six hundred fifty-nine".