11729989 has 2 divisors, whose sum is σ = 11729990. Its totient is φ = 11729988.

The previous prime is 11729947. The next prime is 11730001. The reversal of 11729989 is 98992711.

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., 6041764 + 5688225 = 2458^2 + 2385^2 .

It is a cyclic number.

It is not a de Polignac number, because 11729989 - 2¹³ = 11721797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11729909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5864994 + 5864995.

It is an arithmetic number, because the mean of its divisors is an integer number (5864995).

Almost surely, 2^11729989 is an apocalyptic number.

It is an amenable number.

11729989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11729989 is an equidigital number, since it uses as much as digits as its factorization.

11729989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 46.

The square root of 11729989 is about 3424.9071520262. The cubic root of 11729989 is about 227.2126646568.

The spelling of 11729989 in words is "eleven million, seven hundred twenty-nine thousand, nine hundred eighty-nine".