1089983947 has 4 divisors (see below), whose sum is σ = 1173828880. Its totient is φ = 1006139016.

The previous prime is 1089983903. The next prime is 1089983959. The reversal of 1089983947 is 7493899801.

It is a happy number.

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 1089983947 - 2¹¹ = 1089981899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1089983891 and 1089983900.

It is not an unprimeable number, because it can be changed into a prime (1089987947) 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, 41922447 + ... + 41922472.

It is an arithmetic number, because the mean of its divisors is an integer number (293457220).

Almost surely, 2^1089983947 is an apocalyptic number.

1089983947 is a deficient number, since it is larger than the sum of its proper divisors (83844933).

1089983947 is an equidigital number, since it uses as much as digits as its factorization.

1089983947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83844932.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The square root of 1089983947 is about 33014.9049218682. The cubic root of 1089983947 is about 1029.1374143069.

The spelling of 1089983947 in words is "one billion, eighty-nine million, nine hundred eighty-three thousand, nine hundred forty-seven".