11173790989 has 2 divisors, whose sum is σ = 11173790990. Its totient is φ = 11173790988.

The previous prime is 11173790983. The next prime is 11173791011. The reversal of 11173790989 is 98909737111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7063057764 + 4110733225 = 84042^2 + 64115^2 .

It is a cyclic number.

It is not a de Polignac number, because 11173790989 - 2¹⁹ = 11173266701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11173790983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5586895494 + 5586895495.

It is an arithmetic number, because the mean of its divisors is an integer number (5586895495).

Almost surely, 2^11173790989 is an apocalyptic number.

It is an amenable number.

11173790989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11173790989 is an equidigital number, since it uses as much as digits as its factorization.

11173790989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 55.

The spelling of 11173790989 in words is "eleven billion, one hundred seventy-three million, seven hundred ninety thousand, nine hundred eighty-nine".