1115523139 has 2 divisors, whose sum is σ = 1115523140. Its totient is φ = 1115523138.

The previous prime is 1115523137. The next prime is 1115523163. The reversal of 1115523139 is 9313255111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1115523139 - 2¹ = 1115523137 is a prime.

Together with 1115523137, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1115523139.

It is not a weakly prime, because it can be changed into another prime (1115523131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557761569 + 557761570.

It is an arithmetic number, because the mean of its divisors is an integer number (557761570).

Almost surely, 2^1115523139 is an apocalyptic number.

1115523139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115523139 is an equidigital number, since it uses as much as digits as its factorization.

1115523139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4050, while the sum is 31.

The square root of 1115523139 is about 33399.4481840644. The cubic root of 1115523139 is about 1037.1132777303.

The spelling of 1115523139 in words is "one billion, one hundred fifteen million, five hundred twenty-three thousand, one hundred thirty-nine".