11959999 has 2 divisors, whose sum is σ = 11960000. Its totient is φ = 11959998.

The previous prime is 11959979. The next prime is 11960059. The reversal of 11959999 is 99995911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11959999 - 2⁹ = 11959487 is a prime.

11959999 is a modest number, since divided by 9999 gives 1195 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11959939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5979999 + 5980000.

It is an arithmetic number, because the mean of its divisors is an integer number (5980000).

Almost surely, 2^11959999 is an apocalyptic number.

11959999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11959999 is an equidigital number, since it uses as much as digits as its factorization.

11959999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 295245, while the sum is 52.

The square root of 11959999 is about 3458.3231485794. The cubic root of 11959999 is about 228.6881780241.

It can be divided in two parts, 1 and 1959999, that added together give a square (1960000 = 1400²).

The spelling of 11959999 in words is "eleven million, nine hundred fifty-nine thousand, nine hundred ninety-nine".