1027065509 has 4 divisors (see below), whose sum is σ = 1028305260. Its totient is φ = 1025825760.

The previous prime is 1027065503. The next prime is 1027065511. The reversal of 1027065509 is 9055607201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 230584225 + 796481284 = 15185^2 + 28222^2 .

It is a cyclic number.

It is not a de Polignac number, because 1027065509 - 2²⁰ = 1026016933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1027065503) 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, 618632 + ... + 620289.

It is an arithmetic number, because the mean of its divisors is an integer number (257076315).

Almost surely, 2^1027065509 is an apocalyptic number.

It is an amenable number.

1027065509 is a deficient number, since it is larger than the sum of its proper divisors (1239751).

1027065509 is an equidigital number, since it uses as much as digits as its factorization.

1027065509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239750.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 1027065509 is about 32047.8627836553. The cubic root of 1027065509 is about 1008.9416450140.

The spelling of 1027065509 in words is "one billion, twenty-seven million, sixty-five thousand, five hundred nine".