1018490917 has 4 divisors (see below), whose sum is σ = 1020446316. Its totient is φ = 1016535520.

The previous prime is 1018490861. The next prime is 1018490929. The reversal of 1018490917 is 7190948101.

1018490917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7190948101 = 80789 ⋅89009.

It can be written as a sum of positive squares in 2 ways, for example, as 89094721 + 929396196 = 9439^2 + 30486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018490917 - 2⁷ = 1018490789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1018490917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018497917) 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, 976918 + ... + 977959.

It is an arithmetic number, because the mean of its divisors is an integer number (255111579).

Almost surely, 2^1018490917 is an apocalyptic number.

It is an amenable number.

1018490917 is a deficient number, since it is larger than the sum of its proper divisors (1955399).

1018490917 is an equidigital number, since it uses as much as digits as its factorization.

1018490917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955398.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1018490917 is about 31913.8044895935. The cubic root of 1018490917 is about 1006.1260340733.

It can be divided in two parts, 10184 and 90917, that added together give a palindrome (101101).

The spelling of 1018490917 in words is "one billion, eighteen million, four hundred ninety thousand, nine hundred seventeen".