278679671 has 8 divisors (see below), whose sum is σ = 291613824. Its totient is φ = 266029920.

The previous prime is 278679637. The next prime is 278679673. The reversal of 278679671 is 176976872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 278679671 - 2⁶ = 278679607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278679673) 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 7 ways as a sum of consecutive naturals, for example, 69095 + ... + 73016.

It is an arithmetic number, because the mean of its divisors is an integer number (36451728).

Almost surely, 2^278679671 is an apocalyptic number.

278679671 is a deficient number, since it is larger than the sum of its proper divisors (12934153).

278679671 is a wasteful number, since it uses less digits than its factorization.

278679671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142201.

The product of its digits is 1778112, while the sum is 53.

The square root of 278679671 is about 16693.7015368072. The cubic root of 278679671 is about 653.1833358332.

The spelling of 278679671 in words is "two hundred seventy-eight million, six hundred seventy-nine thousand, six hundred seventy-one".