1115911387 has 8 divisors (see below), whose sum is σ = 1157158800. Its totient is φ = 1074848544.

The previous prime is 1115911339. The next prime is 1115911393. The reversal of 1115911387 is 7831195111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1115911387 - 2⁷ = 1115911259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115911337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33768 + ... + 58069.

It is an arithmetic number, because the mean of its divisors is an integer number (144644850).

Almost surely, 2^1115911387 is an apocalyptic number.

1115911387 is a deficient number, since it is larger than the sum of its proper divisors (41247413).

1115911387 is an equidigital number, since it uses as much as digits as its factorization.

1115911387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92285.

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

The square root of 1115911387 is about 33405.2598702659. The cubic root of 1115911387 is about 1037.2335831538.

The spelling of 1115911387 in words is "one billion, one hundred fifteen million, nine hundred eleven thousand, three hundred eighty-seven".