1111888289 has 2 divisors, whose sum is σ = 1111888290. Its totient is φ = 1111888288.

The previous prime is 1111888277. The next prime is 1111888313. The reversal of 1111888289 is 9828881111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1087878289 + 24010000 = 32983^2 + 4900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111888289 - 2⁴ = 1111888273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111888229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555944144 + 555944145.

It is an arithmetic number, because the mean of its divisors is an integer number (555944145).

Almost surely, 2^1111888289 is an apocalyptic number.

It is an amenable number.

1111888289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111888289 is an equidigital number, since it uses as much as digits as its factorization.

1111888289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 47.

The square root of 1111888289 is about 33344.9889638608. The cubic root of 1111888289 is about 1035.9855996095.

The spelling of 1111888289 in words is "one billion, one hundred eleven million, eight hundred eighty-eight thousand, two hundred eighty-nine".