1159788891 has 8 divisors (see below), whose sum is σ = 1550466880. Its totient is φ = 771151752.

The previous prime is 1159788811. The next prime is 1159788941. The reversal of 1159788891 is 1988879511.

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

It is not a de Polignac number, because 1159788891 - 2⁹ = 1159788379 is a prime.

It is a super-2 number, since 2×1159788891² = 2690220543374019762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1159788811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508885 + ... + 511158.

It is an arithmetic number, because the mean of its divisors is an integer number (193808360).

Almost surely, 2^1159788891 is an apocalyptic number.

1159788891 is a deficient number, since it is larger than the sum of its proper divisors (390677989).

1159788891 is a wasteful number, since it uses less digits than its factorization.

1159788891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020425.

The product of its digits is 1451520, while the sum is 57.

The square root of 1159788891 is about 34055.6734040013. The cubic root of 1159788891 is about 1050.6538304199.

The spelling of 1159788891 in words is "one billion, one hundred fifty-nine million, seven hundred eighty-eight thousand, eight hundred ninety-one".