1098599321 has 8 divisors (see below), whose sum is σ = 1113008904. Its totient is φ = 1084259200.

The previous prime is 1098599311. The next prime is 1098599429. The reversal of 1098599321 is 1239958901.

It can be written as a sum of positive squares in 4 ways, for example, as 102313225 + 996286096 = 10115^2 + 31564^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1098599321 is a prime.

It is a super-2 number, since 2×1098599321² = 2413840936203322082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098599311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14861 + ... + 49173.

It is an arithmetic number, because the mean of its divisors is an integer number (139126113).

Almost surely, 2^1098599321 is an apocalyptic number.

It is an amenable number.

1098599321 is a deficient number, since it is larger than the sum of its proper divisors (14409583).

1098599321 is a wasteful number, since it uses less digits than its factorization.

1098599321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34731.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 1098599321 is about 33145.1251468447. The cubic root of 1098599321 is about 1031.8417799348.

The spelling of 1098599321 in words is "one billion, ninety-eight million, five hundred ninety-nine thousand, three hundred twenty-one".