11959897 has 2 divisors, whose sum is σ = 11959898. Its totient is φ = 11959896.

The previous prime is 11959867. The next prime is 11959901. The reversal of 11959897 is 79895911.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9585216 + 2374681 = 3096^2 + 1541^2 .

It is a cyclic number.

It is not a de Polignac number, because 11959897 - 2¹¹ = 11957849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11959897.

It is not a weakly prime, because it can be changed into another prime (11959867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5979948 + 5979949.

It is an arithmetic number, because the mean of its divisors is an integer number (5979949).

Almost surely, 2^11959897 is an apocalyptic number.

It is an amenable number.

11959897 is a deficient number, since it is larger than the sum of its proper divisors (1).

11959897 is an equidigital number, since it uses as much as digits as its factorization.

11959897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 49.

The square root of 11959897 is about 3458.3084015166. The cubic root of 11959897 is about 228.6875279053.

The spelling of 11959897 in words is "eleven million, nine hundred fifty-nine thousand, eight hundred ninety-seven".