279678047 has 4 divisors (see below), whose sum is σ = 305103336. Its totient is φ = 254252760.

The previous prime is 279678029. The next prime is 279678089. The reversal of 279678047 is 740876972.

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 279678047 - 2⁸ = 279677791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 279677986 and 279678004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279678647) 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, 12712628 + ... + 12712649.

It is an arithmetic number, because the mean of its divisors is an integer number (76275834).

Almost surely, 2^279678047 is an apocalyptic number.

279678047 is a deficient number, since it is larger than the sum of its proper divisors (25425289).

279678047 is a wasteful number, since it uses less digits than its factorization.

279678047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25425288.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The square root of 279678047 is about 16723.5775777792. The cubic root of 279678047 is about 653.9624207257.

The spelling of 279678047 in words is "two hundred seventy-nine million, six hundred seventy-eight thousand, forty-seven".