1098197297 has 4 divisors (see below), whose sum is σ = 1162797156. Its totient is φ = 1033597440.

The previous prime is 1098197293. The next prime is 1098197323. The reversal of 1098197297 is 7927918901.

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

It can be written as a sum of positive squares in 2 ways, for example, as 612612001 + 485585296 = 24751^2 + 22036^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098197297 - 2² = 1098197293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098197293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32299904 + ... + 32299937.

It is an arithmetic number, because the mean of its divisors is an integer number (290699289).

Almost surely, 2^1098197297 is an apocalyptic number.

1098197297 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1098197297 is a deficient number, since it is larger than the sum of its proper divisors (64599859).

1098197297 is an equidigital number, since it uses as much as digits as its factorization.

1098197297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64599858.

The product of its (nonzero) digits is 571536, while the sum is 53.

The square root of 1098197297 is about 33139.0599896859. The cubic root of 1098197297 is about 1031.7158997154.

The spelling of 1098197297 in words is "one billion, ninety-eight million, one hundred ninety-seven thousand, two hundred ninety-seven".