1111157389 has 2 divisors, whose sum is σ = 1111157390. Its totient is φ = 1111157388.

The previous prime is 1111157387. The next prime is 1111157423. The reversal of 1111157389 is 9837511111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1071252900 + 39904489 = 32730^2 + 6317^2 .

It is an emirp because it is prime and its reverse (9837511111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111157389 - 2¹ = 1111157387 is a prime.

Together with 1111157387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111157381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555578694 + 555578695.

It is an arithmetic number, because the mean of its divisors is an integer number (555578695).

Almost surely, 2^1111157389 is an apocalyptic number.

It is an amenable number.

1111157389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111157389 is an equidigital number, since it uses as much as digits as its factorization.

1111157389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 37.

The square root of 1111157389 is about 33334.0274944388. The cubic root of 1111157389 is about 1035.7585480677.

The spelling of 1111157389 in words is "one billion, one hundred eleven million, one hundred fifty-seven thousand, three hundred eighty-nine".