1098098821 has 8 divisors (see below), whose sum is σ = 1158719040. Its totient is φ = 1038551712.

The previous prime is 1098098819. The next prime is 1098098843. The reversal of 1098098821 is 1288908901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1098098821 - 2¹ = 1098098819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098098861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266175 + ... + 270268.

It is an arithmetic number, because the mean of its divisors is an integer number (144839880).

Almost surely, 2^1098098821 is an apocalyptic number.

It is an amenable number.

1098098821 is a deficient number, since it is larger than the sum of its proper divisors (60620219).

1098098821 is an equidigital number, since it uses as much as digits as its factorization.

1098098821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536555.

The product of its (nonzero) digits is 82944, while the sum is 46.

The square root of 1098098821 is about 33137.5741568389. The cubic root of 1098098821 is about 1031.6850606023.

The spelling of 1098098821 in words is "one billion, ninety-eight million, ninety-eight thousand, eight hundred twenty-one".