280134479 has 2 divisors, whose sum is σ = 280134480. Its totient is φ = 280134478.

The previous prime is 280134467. The next prime is 280134493. The reversal of 280134479 is 974431082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280134479 - 2⁸ = 280134223 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280133479) 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 as a sum of consecutive naturals, namely, 140067239 + 140067240.

It is an arithmetic number, because the mean of its divisors is an integer number (140067240).

Almost surely, 2^280134479 is an apocalyptic number.

280134479 is a deficient number, since it is larger than the sum of its proper divisors (1).

280134479 is an equidigital number, since it uses as much as digits as its factorization.

280134479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 280134479 is about 16737.2183770183. The cubic root of 280134479 is about 654.3179809238.

The spelling of 280134479 in words is "two hundred eighty million, one hundred thirty-four thousand, four hundred seventy-nine".