1009198 has 4 divisors (see below), whose sum is σ = 1513800. Its totient is φ = 504598.

The previous prime is 1009193. The next prime is 1009199. The reversal of 1009198 is 8919001.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252298 + ... + 252301.

It is an arithmetic number, because the mean of its divisors is an integer number (378450).

2^1009198 is an apocalyptic number.

1009198 is a deficient number, since it is larger than the sum of its proper divisors (504602).

1009198 is an equidigital number, since it uses as much as digits as its factorization.

1009198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504601.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1009198 is about 1004.5884729580. The cubic root of 1009198 is about 100.3056647387.

The spelling of 1009198 in words is "one million, nine thousand, one hundred ninety-eight".