1279763447 has 4 divisors (see below), whose sum is σ = 1335405360. Its totient is φ = 1224121536.

The previous prime is 1279763431. The next prime is 1279763453. The reversal of 1279763447 is 7443679721.

It is a happy number.

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 1279763447 - 2⁴ = 1279763431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1279763395 and 1279763404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279763467) 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, 27820922 + ... + 27820967.

It is an arithmetic number, because the mean of its divisors is an integer number (333851340).

Almost surely, 2^1279763447 is an apocalyptic number.

1279763447 is a deficient number, since it is larger than the sum of its proper divisors (55641913).

1279763447 is an equidigital number, since it uses as much as digits as its factorization.

1279763447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55641912.

The product of its digits is 1778112, while the sum is 50.

The square root of 1279763447 is about 35773.7815585660. The cubic root of 1279763447 is about 1085.7001567224.

The spelling of 1279763447 in words is "one billion, two hundred seventy-nine million, seven hundred sixty-three thousand, four hundred forty-seven".