11989210837 has 2 divisors, whose sum is σ = 11989210838. Its totient is φ = 11989210836.

The previous prime is 11989210819. The next prime is 11989210859. The reversal of 11989210837 is 73801298911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6986619396 + 5002591441 = 83586^2 + 70729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11989210837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11989210867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5994605418 + 5994605419.

It is an arithmetic number, because the mean of its divisors is an integer number (5994605419).

Almost surely, 2^11989210837 is an apocalyptic number.

It is an amenable number.

11989210837 is a deficient number, since it is larger than the sum of its proper divisors (1).

11989210837 is an equidigital number, since it uses as much as digits as its factorization.

11989210837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 49.

The spelling of 11989210837 in words is "eleven billion, nine hundred eighty-nine million, two hundred ten thousand, eight hundred thirty-seven".