1081606843 has 4 divisors (see below), whose sum is σ = 1081767960. Its totient is φ = 1081445728.

The previous prime is 1081606831. The next prime is 1081606847. The reversal of 1081606843 is 3486061801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3486061801 = 7723 ⋅451387.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1081606843 is a prime.

It is a super-5 number, since 5×1081606843⁵ (a number of 46 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081606847) 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, 70030 + ... + 84067.

It is an arithmetic number, because the mean of its divisors is an integer number (270441990).

Almost surely, 2^1081606843 is an apocalyptic number.

1081606843 is a deficient number, since it is larger than the sum of its proper divisors (161117).

1081606843 is an equidigital number, since it uses as much as digits as its factorization.

1081606843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161116.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 1081606843 is about 32887.7917014810. The cubic root of 1081606843 is about 1026.4941423267.

The spelling of 1081606843 in words is "one billion, eighty-one million, six hundred six thousand, eight hundred forty-three".