2016279409 has 9 divisors (see below), whose sum is σ = 2044643979. Its totient is φ = 1988304840.

The previous prime is 2016279379. The next prime is 2016279413. The reversal of 2016279409 is 9049726102.

The square root of 2016279409 is 44903.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 801059809 + 1215219600 = 28303^2 + 34860^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2016279409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2016279469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3726679 + ... + 3727219.

Almost surely, 2^2016279409 is an apocalyptic number.

2016279409 is the 44903-rd square number.

2016279409 is the 22452-nd centered octagonal number.

It is an amenable number.

2016279409 is a deficient number, since it is larger than the sum of its proper divisors (28364570).

2016279409 is an frugal number, since it uses more digits than its factorization.

2016279409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The cubic root of 2016279409 is about 1263.3302782016.

The spelling of 2016279409 in words is "two billion, sixteen million, two hundred seventy-nine thousand, four hundred nine".