1153863871 has 4 divisors (see below), whose sum is σ = 1153938744. Its totient is φ = 1153789000.

The previous prime is 1153863857. The next prime is 1153863911. The reversal of 1153863871 is 1783683511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1153863871 - 2⁷ = 1153863743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153863071) 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, 4885 + ... + 48286.

It is an arithmetic number, because the mean of its divisors is an integer number (288484686).

Almost surely, 2^1153863871 is an apocalyptic number.

1153863871 is a deficient number, since it is larger than the sum of its proper divisors (74873).

1153863871 is an equidigital number, since it uses as much as digits as its factorization.

1153863871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74872.

The product of its digits is 120960, while the sum is 43.

The square root of 1153863871 is about 33968.5718127801. The cubic root of 1153863871 is about 1048.8616146102.

The spelling of 1153863871 in words is "one billion, one hundred fifty-three million, eight hundred sixty-three thousand, eight hundred seventy-one".