1045561609 has 4 divisors (see below), whose sum is σ = 1046774016. Its totient is φ = 1044349204.

The previous prime is 1045561579. The next prime is 1045561613. The reversal of 1045561609 is 9061655401.

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 1045561609 - 2¹⁹ = 1045037321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045561619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604909 + ... + 606634.

It is an arithmetic number, because the mean of its divisors is an integer number (261693504).

Almost surely, 2^1045561609 is an apocalyptic number.

It is an amenable number.

1045561609 is a deficient number, since it is larger than the sum of its proper divisors (1212407).

1045561609 is an equidigital number, since it uses as much as digits as its factorization.

1045561609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212406.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1045561609 is about 32335.1451055968. The cubic root of 1045561609 is about 1014.9622184971.

The spelling of 1045561609 in words is "one billion, forty-five million, five hundred sixty-one thousand, six hundred nine".