280065479 has 2 divisors, whose sum is σ = 280065480. Its totient is φ = 280065478.

The previous prime is 280065451. The next prime is 280065523. The reversal of 280065479 is 974560082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280065479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280067479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140032739 + 140032740.

It is an arithmetic number, because the mean of its divisors is an integer number (140032740).

Almost surely, 2^280065479 is an apocalyptic number.

280065479 is a deficient number, since it is larger than the sum of its proper divisors (1).

280065479 is an equidigital number, since it uses as much as digits as its factorization.

280065479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 280065479 is about 16735.1569756606. The cubic root of 280065479 is about 654.2642547656.

The spelling of 280065479 in words is "two hundred eighty million, sixty-five thousand, four hundred seventy-nine".