1349920009729 has 4 divisors (see below), whose sum is σ = 1351776846784. Its totient is φ = 1348063172676.

The previous prime is 1349920009717. The next prime is 1349920009733. The reversal of 1349920009729 is 9279000299431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1349920009729 - 2²⁷ = 1349785792001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1349920009729.

It is not an unprimeable number, because it can be changed into a prime (1349920009709) 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, 928417437 + ... + 928418890.

It is an arithmetic number, because the mean of its divisors is an integer number (337944211696).

Almost surely, 2^{1349920009729} is an apocalyptic number.

It is an amenable number.

1349920009729 is a deficient number, since it is larger than the sum of its proper divisors (1856837055).

1349920009729 is an equidigital number, since it uses as much as digits as its factorization.

1349920009729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856837054.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 1349920009729 in words is "one trillion, three hundred forty-nine billion, nine hundred twenty million, nine thousand, seven hundred twenty-nine".