1084947609 has 4 divisors (see below), whose sum is σ = 1446596816. Its totient is φ = 723298404.

The previous prime is 1084947587. The next prime is 1084947613. The reversal of 1084947609 is 9067494801.

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 de Polignac number, because none of the positive numbers 2^k-1084947609 is a prime.

It is a super-2 number, since 2×1084947609² = 2354222628549633762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1084947629) 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, 180824599 + ... + 180824604.

It is an arithmetic number, because the mean of its divisors is an integer number (361649204).

Almost surely, 2^1084947609 is an apocalyptic number.

It is an amenable number.

1084947609 is a deficient number, since it is larger than the sum of its proper divisors (361649207).

1084947609 is an equidigital number, since it uses as much as digits as its factorization.

1084947609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361649206.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 1084947609 is about 32938.5429094852. The cubic root of 1084947609 is about 1027.5499024431.

The spelling of 1084947609 in words is "one billion, eighty-four million, nine hundred forty-seven thousand, six hundred nine".