1098570809 has 8 divisors (see below), whose sum is σ = 1282222848. Its totient is φ = 921597120.

The previous prime is 1098570797. The next prime is 1098570829. The reversal of 1098570809 is 9080758901.

It is a happy number.

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 1098570809 - 2¹² = 1098566713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098570829) 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, 1669232 + ... + 1669889.

It is an arithmetic number, because the mean of its divisors is an integer number (160277856).

Almost surely, 2^1098570809 is an apocalyptic number.

It is an amenable number.

1098570809 is a deficient number, since it is larger than the sum of its proper divisors (183652039).

1098570809 is an equidigital number, since it uses as much as digits as its factorization.

1098570809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339175.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 1098570809 is about 33144.6950355558. The cubic root of 1098570809 is about 1031.8328533782.

The spelling of 1098570809 in words is "one billion, ninety-eight million, five hundred seventy thousand, eight hundred nine".