11979559 has 2 divisors, whose sum is σ = 11979560. Its totient is φ = 11979558.

The previous prime is 11979553. The next prime is 11979563. The reversal of 11979559 is 95597911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11979559 - 2⁹ = 11979047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11979553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5989779 + 5989780.

It is an arithmetic number, because the mean of its divisors is an integer number (5989780).

Almost surely, 2^11979559 is an apocalyptic number.

11979559 is a deficient number, since it is larger than the sum of its proper divisors (1).

11979559 is an equidigital number, since it uses as much as digits as its factorization.

11979559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127575, while the sum is 46.

The square root of 11979559 is about 3461.1499534114. The cubic root of 11979559 is about 228.8127796076.

The spelling of 11979559 in words is "eleven million, nine hundred seventy-nine thousand, five hundred fifty-nine".