11289817391 has 2 divisors, whose sum is σ = 11289817392. Its totient is φ = 11289817390.

The previous prime is 11289817361. The next prime is 11289817481. The reversal of 11289817391 is 19371898211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11289817391 - 2⁶ = 11289817327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11289817361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5644908695 + 5644908696.

It is an arithmetic number, because the mean of its divisors is an integer number (5644908696).

Almost surely, 2^11289817391 is an apocalyptic number.

11289817391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11289817391 is an equidigital number, since it uses as much as digits as its factorization.

11289817391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 50.

The spelling of 11289817391 in words is "eleven billion, two hundred eighty-nine million, eight hundred seventeen thousand, three hundred ninety-one".