11358911989 has 2 divisors, whose sum is σ = 11358911990. Its totient is φ = 11358911988.

The previous prime is 11358911983. The next prime is 11358912029. The reversal of 11358911989 is 98911985311.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10207667089 + 1151244900 = 101033^2 + 33930^2 .

It is a cyclic number.

It is not a de Polignac number, because 11358911989 - 2¹⁵ = 11358879221 is a prime.

It is a super-2 number, since 2×11358911989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11358911983) 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, 5679455994 + 5679455995.

It is an arithmetic number, because the mean of its divisors is an integer number (5679455995).

Almost surely, 2^11358911989 is an apocalyptic number.

It is an amenable number.

11358911989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11358911989 is an equidigital number, since it uses as much as digits as its factorization.

11358911989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 55.

The spelling of 11358911989 in words is "eleven billion, three hundred fifty-eight million, nine hundred eleven thousand, nine hundred eighty-nine".