280025279 has 2 divisors, whose sum is σ = 280025280. Its totient is φ = 280025278.

The previous prime is 280025267. The next prime is 280025303. The reversal of 280025279 is 972520082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280025279 - 2²⁰ = 278976703 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280025579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140012639 + 140012640.

It is an arithmetic number, because the mean of its divisors is an integer number (140012640).

Almost surely, 2^280025279 is an apocalyptic number.

280025279 is a deficient number, since it is larger than the sum of its proper divisors (1).

280025279 is an equidigital number, since it uses as much as digits as its factorization.

280025279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 280025279 is about 16733.9558682339. The cubic root of 280025279 is about 654.2329493703.

The spelling of 280025279 in words is "two hundred eighty million, twenty-five thousand, two hundred seventy-nine".