1392921391679 has 4 divisors (see below), whose sum is σ = 1392924779160. Its totient is φ = 1392918004200.

The previous prime is 1392921391661. The next prime is 1392921391699. The reversal of 1392921391679 is 9761931292931.

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

It is a cyclic number.

It is not a de Polignac number, because 1392921391679 - 2²⁴ = 1392904614463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1392921391699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975389 + ... + 1933190.

It is an arithmetic number, because the mean of its divisors is an integer number (348231194790).

Almost surely, 2^{1392921391679} is an apocalyptic number.

1392921391679 is a deficient number, since it is larger than the sum of its proper divisors (3387481).

1392921391679 is an equidigital number, since it uses as much as digits as its factorization.

1392921391679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387480.

The product of its digits is 9920232, while the sum is 62.

The spelling of 1392921391679 in words is "one trillion, three hundred ninety-two billion, nine hundred twenty-one million, three hundred ninety-one thousand, six hundred seventy-nine".