1098640573 has 2 divisors, whose sum is σ = 1098640574. Its totient is φ = 1098640572.

The previous prime is 1098640559. The next prime is 1098640637. The reversal of 1098640573 is 3750468901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 846402649 + 252237924 = 29093^2 + 15882^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098640573 - 2¹⁷ = 1098509501 is a prime.

It is a super-2 number, since 2×1098640573² = 2414022217283536658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1098640523) 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 as a sum of consecutive naturals, namely, 549320286 + 549320287.

It is an arithmetic number, because the mean of its divisors is an integer number (549320287).

Almost surely, 2^1098640573 is an apocalyptic number.

It is an amenable number.

1098640573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098640573 is an equidigital number, since it uses as much as digits as its factorization.

1098640573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1098640573 is about 33145.7474346258. The cubic root of 1098640573 is about 1031.8546948662.

The spelling of 1098640573 in words is "one billion, ninety-eight million, six hundred forty thousand, five hundred seventy-three".