1209395799147 has 4 divisors (see below), whose sum is σ = 1612527732200. Its totient is φ = 806263866096.

The previous prime is 1209395799119. The next prime is 1209395799149. The reversal of 1209395799147 is 7419975939021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1209395799147 - 2¹² = 1209395795051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1209395799149) 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, 201565966522 + ... + 201565966527.

It is an arithmetic number, because the mean of its divisors is an integer number (403131933050).

Almost surely, 2^{1209395799147} is an apocalyptic number.

1209395799147 is a deficient number, since it is larger than the sum of its proper divisors (403131933053).

1209395799147 is an equidigital number, since it uses as much as digits as its factorization.

1209395799147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403131933052.

The product of its (nonzero) digits is 38578680, while the sum is 66.

The spelling of 1209395799147 in words is "one trillion, two hundred nine billion, three hundred ninety-five million, seven hundred ninety-nine thousand, one hundred forty-seven".