1379448727769 has 4 divisors (see below), whose sum is σ = 1576512831744. Its totient is φ = 1182384623796.

The previous prime is 1379448727751. The next prime is 1379448727771. The reversal of 1379448727769 is 9677278449731.

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 a de Polignac number, because none of the positive numbers 2^k-1379448727769 is a prime.

It is a super-2 number, since 2×1379448727769² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1379448727696 and 1379448727705.

It is not an unprimeable number, because it can be changed into a prime (1379448727729) 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, 98532051977 + ... + 98532051990.

It is an arithmetic number, because the mean of its divisors is an integer number (394128207936).

Almost surely, 2^{1379448727769} is an apocalyptic number.

It is an amenable number.

1379448727769 is a deficient number, since it is larger than the sum of its proper divisors (197064103975).

1379448727769 is an equidigital number, since it uses as much as digits as its factorization.

1379448727769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197064103974.

The product of its digits is 896168448, while the sum is 74.

The spelling of 1379448727769 in words is "one trillion, three hundred seventy-nine billion, four hundred forty-eight million, seven hundred twenty-seven thousand, seven hundred sixty-nine".