1198298661 has 8 divisors (see below), whose sum is σ = 1825978944. Its totient is φ = 684742080.

The previous prime is 1198298653. The next prime is 1198298663. The reversal of 1198298661 is 1668928911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1198298661 - 2³ = 1198298653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198298663) 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, 28530900 + ... + 28530941.

It is an arithmetic number, because the mean of its divisors is an integer number (228247368).

Almost surely, 2^1198298661 is an apocalyptic number.

It is an amenable number.

1198298661 is a deficient number, since it is larger than the sum of its proper divisors (627680283).

1198298661 is an equidigital number, since it uses as much as digits as its factorization.

1198298661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57061851.

The product of its digits is 373248, while the sum is 51.

The square root of 1198298661 is about 34616.4507279415. The cubic root of 1198298661 is about 1062.1561254148.

The spelling of 1198298661 in words is "one billion, one hundred ninety-eight million, two hundred ninety-eight thousand, six hundred sixty-one".