1163663969 has 4 divisors (see below), whose sum is σ = 1253176596. Its totient is φ = 1074151344.

The previous prime is 1163663959. The next prime is 1163664011. The reversal of 1163663969 is 9693663611.

It is a happy number.

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 639482944 + 524181025 = 25288^2 + 22895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163663969 - 2⁴ = 1163663953 is a prime.

It is a super-2 number, since 2×1163663969² = 2708227665497665922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163663959) 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, 44756294 + ... + 44756319.

It is an arithmetic number, because the mean of its divisors is an integer number (313294149).

Almost surely, 2^1163663969 is an apocalyptic number.

It is an amenable number.

1163663969 is a deficient number, since it is larger than the sum of its proper divisors (89512627).

1163663969 is an equidigital number, since it uses as much as digits as its factorization.

1163663969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89512626.

The product of its digits is 944784, while the sum is 50.

The square root of 1163663969 is about 34112.5192414750. The cubic root of 1163663969 is about 1051.8226751893.

The spelling of 1163663969 in words is "one billion, one hundred sixty-three million, six hundred sixty-three thousand, nine hundred sixty-nine".