1356009999 has 4 divisors (see below), whose sum is σ = 1808013336. Its totient is φ = 904006664.

The previous prime is 1356009997. The next prime is 1356010009. The reversal of 1356009999 is 9999006531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9999006531 = 3 ⋅3333002177.

It is a cyclic number.

It is not a de Polignac number, because 1356009999 - 2¹ = 1356009997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356009997) by changing a digit.

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, 226001664 + ... + 226001669.

It is an arithmetic number, because the mean of its divisors is an integer number (452003334).

Almost surely, 2^1356009999 is an apocalyptic number.

1356009999 is a deficient number, since it is larger than the sum of its proper divisors (452003337).

1356009999 is an equidigital number, since it uses as much as digits as its factorization.

1356009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452003336.

The product of its (nonzero) digits is 590490, while the sum is 51.

The square root of 1356009999 is about 36824.0410465772. The cubic root of 1356009999 is about 1106.8470977744.

The spelling of 1356009999 in words is "one billion, three hundred fifty-six million, nine thousand, nine hundred ninety-nine".