2009154065 has 4 divisors (see below), whose sum is σ = 2410984884. Its totient is φ = 1607323248.

The previous prime is 2009154053. The next prime is 2009154071. The reversal of 2009154065 is 5604519002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5604519002 = 2 ⋅2802259501.

It can be written as a sum of positive squares in 2 ways, for example, as 444872464 + 1564281601 = 21092^2 + 39551^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009154065 - 2¹⁴ = 2009137681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200915402 + ... + 200915411.

It is an arithmetic number, because the mean of its divisors is an integer number (602746221).

Almost surely, 2^2009154065 is an apocalyptic number.

It is an amenable number.

2009154065 is a deficient number, since it is larger than the sum of its proper divisors (401830819).

2009154065 is an equidigital number, since it uses as much as digits as its factorization.

2009154065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401830818.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 2009154065 is about 44823.5882655550. The cubic root of 2009154065 is about 1261.8403578191.

The spelling of 2009154065 in words is "two billion, nine million, one hundred fifty-four thousand, sixty-five".