1163972881 has 8 divisors (see below), whose sum is σ = 1234483200. Its totient is φ = 1093689408.

The previous prime is 1163972863. The next prime is 1163972893. The reversal of 1163972881 is 1882793611.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1163972881 - 2²³ = 1155584273 is a prime.

It is a super-2 number, since 2×1163972881² = 2709665735406880322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163982881) 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 7 ways as a sum of consecutive naturals, for example, 46081 + ... + 66718.

It is an arithmetic number, because the mean of its divisors is an integer number (154310400).

Almost surely, 2^1163972881 is an apocalyptic number.

It is an amenable number.

1163972881 is a deficient number, since it is larger than the sum of its proper divisors (70510319).

1163972881 is a wasteful number, since it uses less digits than its factorization.

1163972881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113423.

The product of its digits is 145152, while the sum is 46.

The square root of 1163972881 is about 34117.0467801655. The cubic root of 1163972881 is about 1051.9157409733.

The spelling of 1163972881 in words is "one billion, one hundred sixty-three million, nine hundred seventy-two thousand, eight hundred eighty-one".