279328447 has 2 divisors, whose sum is σ = 279328448. Its totient is φ = 279328446.

The previous prime is 279328433. The next prime is 279328451. The reversal of 279328447 is 744823972.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279328447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 279328397 and 279328406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279328457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139664223 + 139664224.

It is an arithmetic number, because the mean of its divisors is an integer number (139664224).

Almost surely, 2^279328447 is an apocalyptic number.

279328447 is a deficient number, since it is larger than the sum of its proper divisors (1).

279328447 is an equidigital number, since it uses as much as digits as its factorization.

279328447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The square root of 279328447 is about 16713.1220003924. The cubic root of 279328447 is about 653.6898208653.

The spelling of 279328447 in words is "two hundred seventy-nine million, three hundred twenty-eight thousand, four hundred forty-seven".