1198444769 has 4 divisors (see below), whose sum is σ = 1198653696. Its totient is φ = 1198235844.

The previous prime is 1198444759. The next prime is 1198444781. The reversal of 1198444769 is 9674448911.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9674448911 = 4493 ⋅2153227.

It is a cyclic number.

It is not a de Polignac number, because 1198444769 - 2¹² = 1198440673 is a prime.

It is a super-2 number, since 2×1198444769² = 2872539728686926722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1198444769.

It is not an unprimeable number, because it can be changed into a prime (1198444729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95609 + ... + 107414.

It is an arithmetic number, because the mean of its divisors is an integer number (299663424).

Almost surely, 2^1198444769 is an apocalyptic number.

It is an amenable number.

1198444769 is a deficient number, since it is larger than the sum of its proper divisors (208927).

1198444769 is an equidigital number, since it uses as much as digits as its factorization.

1198444769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208926.

The product of its digits is 1741824, while the sum is 53.

The square root of 1198444769 is about 34618.5610475074. The cubic root of 1198444769 is about 1062.1992930616.

The spelling of 1198444769 in words is "one billion, one hundred ninety-eight million, four hundred forty-four thousand, seven hundred sixty-nine".