1008198985 has 8 divisors (see below), whose sum is σ = 1226412360. Its totient is φ = 795510144.

The previous prime is 1008198973. The next prime is 1008199013. The reversal of 1008198985 is 5898918001.

It can be written as a sum of positive squares in 4 ways, for example, as 397763136 + 610435849 = 19944^2 + 24707^2 .

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 1008198985 - 2⁵ = 1008198953 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1380730 + ... + 1381459.

It is an arithmetic number, because the mean of its divisors is an integer number (153301545).

Almost surely, 2^1008198985 is an apocalyptic number.

It is an amenable number.

1008198985 is a deficient number, since it is larger than the sum of its proper divisors (218213375).

1008198985 is an equidigital number, since it uses as much as digits as its factorization.

1008198985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762267.

The product of its (nonzero) digits is 207360, while the sum is 49.

The square root of 1008198985 is about 31752.1492973310. The cubic root of 1008198985 is about 1002.7255595759.

The spelling of 1008198985 in words is "one billion, eight million, one hundred ninety-eight thousand, nine hundred eighty-five".