1116781447 has 4 divisors (see below), whose sum is σ = 1118055736. Its totient is φ = 1115507160.

The previous prime is 1116781439. The next prime is 1116781469. The reversal of 1116781447 is 7441876111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1116781447 - 2³ = 1116781439 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 (1116781747) 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, 635829 + ... + 637582.

It is an arithmetic number, because the mean of its divisors is an integer number (279513934).

Almost surely, 2^1116781447 is an apocalyptic number.

1116781447 is a deficient number, since it is larger than the sum of its proper divisors (1274289).

1116781447 is an equidigital number, since it uses as much as digits as its factorization.

1116781447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274288.

The product of its digits is 37632, while the sum is 40.

The square root of 1116781447 is about 33418.2801322869. The cubic root of 1116781447 is about 1037.5030851411.

The spelling of 1116781447 in words is "one billion, one hundred sixteen million, seven hundred eighty-one thousand, four hundred forty-seven".