1084220509 has 8 divisors (see below), whose sum is σ = 1179025848. Its totient is φ = 992862720.

The previous prime is 1084220497. The next prime is 1084220513. The reversal of 1084220509 is 9050224801.

It can be written as a sum of positive squares in 4 ways, for example, as 651372484 + 432848025 = 25522^2 + 20805^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1084220509 - 2²⁵ = 1050666077 is a prime.

It is a super-2 number, since 2×1084220509² = 2351068224272438162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1084220519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861232 + ... + 862489.

It is an arithmetic number, because the mean of its divisors is an integer number (147378231).

Almost surely, 2^1084220509 is an apocalyptic number.

It is an amenable number.

1084220509 is a deficient number, since it is larger than the sum of its proper divisors (94805339).

1084220509 is a wasteful number, since it uses less digits than its factorization.

1084220509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723775.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1084220509 is about 32927.5038379772. The cubic root of 1084220509 is about 1027.3203065647.

The spelling of 1084220509 in words is "one billion, eighty-four million, two hundred twenty thousand, five hundred nine".