1091179089 has 135 divisors (see below), whose sum is σ = 2183886315. Its totient is φ = 523242720.

The previous prime is 1091179021. The next prime is 1091179091. The reversal of 1091179089 is 9809711901.

The square root of 1091179089 is 33033.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 161417025 + 929762064 = 12705^2 + 30492^2 .

It is not a de Polignac number, because 1091179089 - 2⁹ = 1091178577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1091179009) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 83936847 + ... + 83936859.

Almost surely, 2^1091179089 is an apocalyptic number.

1091179089 is the 33033-rd square number.

1091179089 is the 16517-th centered octagonal number.

It is an amenable number.

1091179089 is an abundant number, since it is smaller than the sum of its proper divisors (1092707226).

1091179089 is an equidigital number, since it uses as much as digits as its factorization.

1091179089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 45.

The cubic root of 1091179089 is about 1029.5134186453.

It can be divided in two parts, 10911 and 79089, that added together give a square (90000 = 300²).

The spelling of 1091179089 in words is "one billion, ninety-one million, one hundred seventy-nine thousand, eighty-nine".