1279648073 has 4 divisors (see below), whose sum is σ = 1395979728. Its totient is φ = 1163316420.

The previous prime is 1279648067. The next prime is 1279648087. The reversal of 1279648073 is 3708469721.

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 1279648073 - 2⁶ = 1279648009 is a prime.

It is a super-2 number, since 2×1279648073² = 3274998381465226658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1279648373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58165811 + ... + 58165832.

It is an arithmetic number, because the mean of its divisors is an integer number (348994932).

Almost surely, 2^1279648073 is an apocalyptic number.

It is an amenable number.

1279648073 is a deficient number, since it is larger than the sum of its proper divisors (116331655).

1279648073 is a wasteful number, since it uses less digits than its factorization.

1279648073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116331654.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 1279648073 is about 35772.1689725407. The cubic root of 1279648073 is about 1085.6675295118.

The spelling of 1279648073 in words is "one billion, two hundred seventy-nine million, six hundred forty-eight thousand, seventy-three".