1145198369 has 4 divisors (see below), whose sum is σ = 1308798144. Its totient is φ = 981598596.

The previous prime is 1145198357. The next prime is 1145198399. The reversal of 1145198369 is 9638915411.

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 a de Polignac number, because none of the positive numbers 2^k-1145198369 is a prime.

It is a super-2 number, since 2×1145198369² = 2622958608720520322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145198339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81799877 + ... + 81799890.

It is an arithmetic number, because the mean of its divisors is an integer number (327199536).

Almost surely, 2^1145198369 is an apocalyptic number.

It is an amenable number.

1145198369 is a deficient number, since it is larger than the sum of its proper divisors (163599775).

1145198369 is an equidigital number, since it uses as much as digits as its factorization.

1145198369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163599774.

The product of its digits is 233280, while the sum is 47.

The square root of 1145198369 is about 33840.7796748243. The cubic root of 1145198369 is about 1046.2293687012.

The spelling of 1145198369 in words is "one billion, one hundred forty-five million, one hundred ninety-eight thousand, three hundred sixty-nine".