1081391983 has 16 divisors (see below), whose sum is σ = 1256808960. Its totient is φ = 911282400.

The previous prime is 1081391963. The next prime is 1081392017. The reversal of 1081391983 is 3891931801.

It is a de Polignac number, because none of the positive numbers 2^k-1081391983 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 (1081391963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185493 + ... + 191233.

It is an arithmetic number, because the mean of its divisors is an integer number (78550560).

Almost surely, 2^1081391983 is an apocalyptic number.

1081391983 is a deficient number, since it is larger than the sum of its proper divisors (175416977).

1081391983 is an equidigital number, since it uses as much as digits as its factorization.

1081391983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6198.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1081391983 is about 32884.5249775635. The cubic root of 1081391983 is about 1026.4261671844.

It can be divided in two parts, 108139198 and 3, that added together give a square (108139201 = 10399²).

The spelling of 1081391983 in words is "one billion, eighty-one million, three hundred ninety-one thousand, nine hundred eighty-three".