2678934779 has 4 divisors (see below), whose sum is σ = 2681351520. Its totient is φ = 2676518040.

The previous prime is 2678934757. The next prime is 2678934823. The reversal of 2678934779 is 9774398762.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9774398762 = 2 ⋅4887199381.

It is a cyclic number.

It is not a de Polignac number, because 2678934779 - 2¹⁶ = 2678869243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678934179) 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, 1206707 + ... + 1208924.

It is an arithmetic number, because the mean of its divisors is an integer number (670337880).

Almost surely, 2^2678934779 is an apocalyptic number.

2678934779 is a deficient number, since it is larger than the sum of its proper divisors (2416741).

2678934779 is a wasteful number, since it uses less digits than its factorization.

2678934779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416740.

The product of its digits is 32006016, while the sum is 62.

The square root of 2678934779 is about 51758.4271302751. The cubic root of 2678934779 is about 1388.8458544037.

The spelling of 2678934779 in words is "two billion, six hundred seventy-eight million, nine hundred thirty-four thousand, seven hundred seventy-nine".