1089729811 has 4 divisors (see below), whose sum is σ = 1137109392. Its totient is φ = 1042350232.

The previous prime is 1089729799. The next prime is 1089729829. The reversal of 1089729811 is 1189279801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1089729811 - 2¹¹ = 1089727763 is a prime.

It is a super-2 number, since 2×1089729811² = 2375022121964191442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089729841) 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, 23689756 + ... + 23689801.

It is an arithmetic number, because the mean of its divisors is an integer number (284277348).

Almost surely, 2^1089729811 is an apocalyptic number.

1089729811 is a deficient number, since it is larger than the sum of its proper divisors (47379581).

1089729811 is an equidigital number, since it uses as much as digits as its factorization.

1089729811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47379580.

The product of its (nonzero) digits is 72576, while the sum is 46.

The square root of 1089729811 is about 33011.0558904134. The cubic root of 1089729811 is about 1029.0574249958.

The spelling of 1089729811 in words is "one billion, eighty-nine million, seven hundred twenty-nine thousand, eight hundred eleven".