1158928091 has 4 divisors (see below), whose sum is σ = 1178571000. Its totient is φ = 1139285184.

The previous prime is 1158928079. The next prime is 1158928093. The reversal of 1158928091 is 1908298511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1908298511 = 7 ⋅272614073.

It is a cyclic number.

It is not a de Polignac number, because 1158928091 - 2⁶ = 1158928027 is a prime.

It is a super-2 number, since 2×1158928091² = 2686228640217808562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1158928093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9821366 + ... + 9821483.

It is an arithmetic number, because the mean of its divisors is an integer number (294642750).

Almost surely, 2^1158928091 is an apocalyptic number.

1158928091 is a deficient number, since it is larger than the sum of its proper divisors (19642909).

1158928091 is an equidigital number, since it uses as much as digits as its factorization.

1158928091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19642908.

The product of its (nonzero) digits is 51840, while the sum is 44.

The square root of 1158928091 is about 34043.0329289269. The cubic root of 1158928091 is about 1050.3938329131.

The spelling of 1158928091 in words is "one billion, one hundred fifty-eight million, nine hundred twenty-eight thousand, ninety-one".