279045887 has 2 divisors, whose sum is σ = 279045888. Its totient is φ = 279045886.

The previous prime is 279045857. The next prime is 279045953. The reversal of 279045887 is 788540972.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279045887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279045827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139522943 + 139522944.

It is an arithmetic number, because the mean of its divisors is an integer number (139522944).

Almost surely, 2^279045887 is an apocalyptic number.

279045887 is a deficient number, since it is larger than the sum of its proper divisors (1).

279045887 is an equidigital number, since it uses as much as digits as its factorization.

279045887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 279045887 is about 16704.6666234319. Note that the first 4 decimals coincide. The cubic root of 279045887 is about 653.4693290465.

The spelling of 279045887 in words is "two hundred seventy-nine million, forty-five thousand, eight hundred eighty-seven".