1098555647 has 12 divisors (see below), whose sum is σ = 1333474416. Its totient is φ = 900678240.

The previous prime is 1098555629. The next prime is 1098555671. The reversal of 1098555647 is 7465558901.

It is not a de Polignac number, because 1098555647 - 2¹⁴ = 1098539263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1098555595 and 1098555604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098555617) 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 11 ways as a sum of consecutive naturals, for example, 486254 + ... + 488507.

It is an arithmetic number, because the mean of its divisors is an integer number (111122868).

Almost surely, 2^1098555647 is an apocalyptic number.

1098555647 is a deficient number, since it is larger than the sum of its proper divisors (234918769).

1098555647 is an equidigital number, since it uses as much as digits as its factorization.

1098555647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974798 (or 974791 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 50.

The square root of 1098555647 is about 33144.4663103813. The cubic root of 1098555647 is about 1031.8281063858.

The spelling of 1098555647 in words is "one billion, ninety-eight million, five hundred fifty-five thousand, six hundred forty-seven".