1198799969 has 2 divisors, whose sum is σ = 1198799970. Its totient is φ = 1198799968.

The previous prime is 1198799947. The next prime is 1198800013. The reversal of 1198799969 is 9699978911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 882387025 + 316412944 = 29705^2 + 17788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1198799969 is a prime.

It is a super-2 number, since 2×1198799969² = 2874242731348801922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1198799899 and 1198799908.

It is not a weakly prime, because it can be changed into another prime (1198799909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599399984 + 599399985.

It is an arithmetic number, because the mean of its divisors is an integer number (599399985).

Almost surely, 2^1198799969 is an apocalyptic number.

It is an amenable number.

1198799969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198799969 is an equidigital number, since it uses as much as digits as its factorization.

1198799969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19840464, while the sum is 68.

The square root of 1198799969 is about 34623.6908633381. The cubic root of 1198799969 is about 1062.3042223640.

It can be divided in two parts, 119 and 8799969, that added together give a palindrome (8800088).

The spelling of 1198799969 in words is "one billion, one hundred ninety-eight million, seven hundred ninety-nine thousand, nine hundred sixty-nine".