1279134649 has 16 divisors (see below), whose sum is σ = 1395418752. Its totient is φ = 1165483008.

The previous prime is 1279134641. The next prime is 1279134653. The reversal of 1279134649 is 9464319721.

It is a cyclic number.

It is not a de Polignac number, because 1279134649 - 2³ = 1279134641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1279134599 and 1279134608.

It is not an unprimeable number, because it can be changed into a prime (1279134641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463257 + ... + 466009.

It is an arithmetic number, because the mean of its divisors is an integer number (87213672).

Almost surely, 2^1279134649 is an apocalyptic number.

It is an amenable number.

1279134649 is a deficient number, since it is larger than the sum of its proper divisors (116284103).

1279134649 is a wasteful number, since it uses less digits than its factorization.

1279134649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216.

The product of its digits is 326592, while the sum is 46.

The square root of 1279134649 is about 35764.9919474337. The cubic root of 1279134649 is about 1085.5223118950.

The spelling of 1279134649 in words is "one billion, two hundred seventy-nine million, one hundred thirty-four thousand, six hundred forty-nine".