1098895009 has 4 divisors (see below), whose sum is σ = 1100169216. Its totient is φ = 1097620804.

The previous prime is 1098895003. The next prime is 1098895013. The reversal of 1098895009 is 9005988901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1098895009 - 2¹¹ = 1098892961 is a prime.

It is a super-2 number, since 2×1098895009² = 2415140481610220162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098895003) 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 3 ways as a sum of consecutive naturals, for example, 635809 + ... + 637534.

It is an arithmetic number, because the mean of its divisors is an integer number (275042304).

Almost surely, 2^1098895009 is an apocalyptic number.

It is an amenable number.

1098895009 is a deficient number, since it is larger than the sum of its proper divisors (1274207).

1098895009 is an equidigital number, since it uses as much as digits as its factorization.

1098895009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274206.

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 1098895009 is about 33149.5853518562. The cubic root of 1098895009 is about 1031.9343450335.

The spelling of 1098895009 in words is "one billion, ninety-eight million, eight hundred ninety-five thousand, nine".