1091959289 has 4 divisors (see below), whose sum is σ = 1102164624. Its totient is φ = 1081753956.

The previous prime is 1091959217. The next prime is 1091959291. The reversal of 1091959289 is 9829591901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1091959289 - 2¹⁶ = 1091893753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1091959289.

It is not an unprimeable number, because it can be changed into a prime (1091959489) 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, 5102507 + ... + 5102720.

It is an arithmetic number, because the mean of its divisors is an integer number (275541156).

Almost surely, 2^1091959289 is an apocalyptic number.

It is an amenable number.

1091959289 is a deficient number, since it is larger than the sum of its proper divisors (10205335).

1091959289 is a wasteful number, since it uses less digits than its factorization.

1091959289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10205334.

The product of its (nonzero) digits is 524880, while the sum is 53.

The square root of 1091959289 is about 33044.8072925233. The cubic root of 1091959289 is about 1029.7587297392.

The spelling of 1091959289 in words is "one billion, ninety-one million, nine hundred fifty-nine thousand, two hundred eighty-nine".