11958559 has 2 divisors, whose sum is σ = 11958560. Its totient is φ = 11958558.

The previous prime is 11958553. The next prime is 11958563. The reversal of 11958559 is 95585911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11958559 - 2⁷ = 11958431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11958553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5979279 + 5979280.

It is an arithmetic number, because the mean of its divisors is an integer number (5979280).

Almost surely, 2^11958559 is an apocalyptic number.

11958559 is a deficient number, since it is larger than the sum of its proper divisors (1).

11958559 is an equidigital number, since it uses as much as digits as its factorization.

11958559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 43.

The square root of 11958559 is about 3458.1149489281. The cubic root of 11958559 is about 228.6789995341.

The spelling of 11958559 in words is "eleven million, nine hundred fifty-eight thousand, five hundred fifty-nine".