1089456547 has 4 divisors (see below), whose sum is σ = 1089660096. Its totient is φ = 1089253000.

The previous prime is 1089456521. The next prime is 1089456553. The reversal of 1089456547 is 7456549801.

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: 7456549801 = 37 ⋅201528373.

It is a cyclic number.

It is not a de Polignac number, because 1089456547 - 2¹⁵ = 1089423779 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 1089456547.

It is not an unprimeable number, because it can be changed into a prime (1089456587) 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, 93523 + ... + 104524.

It is an arithmetic number, because the mean of its divisors is an integer number (272415024).

Almost surely, 2^1089456547 is an apocalyptic number.

1089456547 is a deficient number, since it is larger than the sum of its proper divisors (203549).

1089456547 is an equidigital number, since it uses as much as digits as its factorization.

1089456547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203548.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 1089456547 is about 33006.9166539379. The cubic root of 1089456547 is about 1028.9714012696.

The spelling of 1089456547 in words is "one billion, eighty-nine million, four hundred fifty-six thousand, five hundred forty-seven".