1111111387 has 2 divisors, whose sum is σ = 1111111388. Its totient is φ = 1111111386.

The previous prime is 1111111363. The next prime is 1111111409. The reversal of 1111111387 is 7831111111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111111387 - 2¹¹ = 1111109339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111111087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555555693 + 555555694.

It is an arithmetic number, because the mean of its divisors is an integer number (555555694).

Almost surely, 2^1111111387 is an apocalyptic number.

1111111387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111111387 is an equidigital number, since it uses as much as digits as its factorization.

1111111387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 25.

The square root of 1111111387 is about 33333.3374716664. The cubic root of 1111111387 is about 1035.7442543764.

Adding to 1111111387 its reverse (7831111111), we get a palindrome (8942222498).

The spelling of 1111111387 in words is "one billion, one hundred eleven million, one hundred eleven thousand, three hundred eighty-seven".