1018535849 has 4 divisors (see below), whose sum is σ = 1035233220. Its totient is φ = 1001838480.

The previous prime is 1018535779. The next prime is 1018535851. The reversal of 1018535849 is 9485358101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9485358101 = 331 ⋅28656671.

It can be written as a sum of positive squares in 2 ways, for example, as 232013824 + 786522025 = 15232^2 + 28045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1018535849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1018535249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8348594 + ... + 8348715.

It is an arithmetic number, because the mean of its divisors is an integer number (258808305).

Almost surely, 2^1018535849 is an apocalyptic number.

It is an amenable number.

1018535849 is a deficient number, since it is larger than the sum of its proper divisors (16697371).

1018535849 is an equidigital number, since it uses as much as digits as its factorization.

1018535849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16697370.

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 1018535849 is about 31914.5084405197. The cubic root of 1018535849 is about 1006.1408293583.

The spelling of 1018535849 in words is "one billion, eighteen million, five hundred thirty-five thousand, eight hundred forty-nine".