1293780873921 has 4 divisors (see below), whose sum is σ = 1725041165232. Its totient is φ = 862520582612.

The previous prime is 1293780873919. The next prime is 1293780873953.

1293780873921 is nontrivially palindromic in base 10.

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 1293780873921 - 2¹ = 1293780873919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1293780873991) 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, 215630145651 + ... + 215630145656.

It is an arithmetic number, because the mean of its divisors is an integer number (431260291308).

Almost surely, 2^{1293780873921} is an apocalyptic number.

It is an amenable number.

1293780873921 is a deficient number, since it is larger than the sum of its proper divisors (431260291311).

1293780873921 is an equidigital number, since it uses as much as digits as its factorization.

1293780873921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431260291310.

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 1293780873921 in words is "one trillion, two hundred ninety-three billion, seven hundred eighty million, eight hundred seventy-three thousand, nine hundred twenty-one".