1065072909 has 4 divisors (see below), whose sum is σ = 1420097216. Its totient is φ = 710048604.

The previous prime is 1065072893. The next prime is 1065072919. The reversal of 1065072909 is 9092705601.

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 not a de Polignac number, because 1065072909 - 2⁴ = 1065072893 is a prime.

It is a super-2 number, since 2×1065072909² = 2268760602971444562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065072919) 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, 177512149 + ... + 177512154.

It is an arithmetic number, because the mean of its divisors is an integer number (355024304).

Almost surely, 2^1065072909 is an apocalyptic number.

It is an amenable number.

1065072909 is a deficient number, since it is larger than the sum of its proper divisors (355024307).

1065072909 is an equidigital number, since it uses as much as digits as its factorization.

1065072909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355024306.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 1065072909 is about 32635.4547846357. The cubic root of 1065072909 is about 1021.2367763949.

The spelling of 1065072909 in words is "one billion, sixty-five million, seventy-two thousand, nine hundred nine".