1089723433 has 4 divisors (see below), whose sum is σ = 1093963860. Its totient is φ = 1085483008.

The previous prime is 1089723391. The next prime is 1089723457. The reversal of 1089723433 is 3343279801.

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

It can be written as a sum of positive squares in 2 ways, for example, as 601622784 + 488100649 = 24528^2 + 22093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089723433 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089723493) 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, 2119828 + ... + 2120341.

It is an arithmetic number, because the mean of its divisors is an integer number (273490965).

Almost surely, 2^1089723433 is an apocalyptic number.

It is an amenable number.

1089723433 is a deficient number, since it is larger than the sum of its proper divisors (4240427).

1089723433 is an equidigital number, since it uses as much as digits as its factorization.

1089723433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240426.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 1089723433 is about 33010.9592862734. The cubic root of 1089723433 is about 1029.0554173602.

The spelling of 1089723433 in words is "one billion, eighty-nine million, seven hundred twenty-three thousand, four hundred thirty-three".