1111115959 has 4 divisors (see below), whose sum is σ = 1112042320. Its totient is φ = 1110189600.

The previous prime is 1111115939. The next prime is 1111115977. The reversal of 1111115959 is 9595111111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9595111111 = 359 ⋅26727329.

It is a cyclic number.

It is not a de Polignac number, because 1111115959 - 2¹¹ = 1111113911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111115939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461379 + ... + 463780.

It is an arithmetic number, because the mean of its divisors is an integer number (278010580).

Almost surely, 2^1111115959 is an apocalyptic number.

1111115959 is a deficient number, since it is larger than the sum of its proper divisors (926361).

1111115959 is an equidigital number, since it uses as much as digits as its factorization.

1111115959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926360.

The product of its digits is 2025, while the sum is 34.

The square root of 1111115959 is about 33333.4060515873. The cubic root of 1111115959 is about 1035.7456750009.

The spelling of 1111115959 in words is "one billion, one hundred eleven million, one hundred fifteen thousand, nine hundred fifty-nine".