1409539009 has 4 divisors (see below), whose sum is σ = 1409848660. Its totient is φ = 1409229360.

The previous prime is 1409539007. The next prime is 1409539039. The reversal of 1409539009 is 9009359041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9009359041 = 233 ⋅38666777.

It can be written as a sum of positive squares in 2 ways, for example, as 377330625 + 1032208384 = 19425^2 + 32128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1409539009 - 2¹ = 1409539007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1409539007) 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, 147894 + ... + 157135.

It is an arithmetic number, because the mean of its divisors is an integer number (352462165).

Almost surely, 2^1409539009 is an apocalyptic number.

It is an amenable number.

1409539009 is a deficient number, since it is larger than the sum of its proper divisors (309651).

1409539009 is an equidigital number, since it uses as much as digits as its factorization.

1409539009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309650.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 1409539009 is about 37543.8278416040. The cubic root of 1409539009 is about 1121.2239513434.

The spelling of 1409539009 in words is "one billion, four hundred nine million, five hundred thirty-nine thousand, nine".