1089458243 has 4 divisors (see below), whose sum is σ = 1153544040. Its totient is φ = 1025372448.

The previous prime is 1089458239. The next prime is 1089458281. The reversal of 1089458243 is 3428549801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3428549801 = 9623 ⋅356287.

It is a cyclic number.

It is not a de Polignac number, because 1089458243 - 2² = 1089458239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1089458194 and 1089458203.

It is not an unprimeable number, because it can be changed into a prime (1089458213) 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, 32042873 + ... + 32042906.

It is an arithmetic number, because the mean of its divisors is an integer number (288386010).

Almost surely, 2^1089458243 is an apocalyptic number.

1089458243 is a deficient number, since it is larger than the sum of its proper divisors (64085797).

1089458243 is an equidigital number, since it uses as much as digits as its factorization.

1089458243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64085796.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 1089458243 is about 33006.9423455127. The cubic root of 1089458243 is about 1028.9719352161.

The spelling of 1089458243 in words is "one billion, eighty-nine million, four hundred fifty-eight thousand, two hundred forty-three".