280857463 has 2 divisors, whose sum is σ = 280857464. Its totient is φ = 280857462.

The previous prime is 280857461. The next prime is 280857497. The reversal of 280857463 is 364758082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280857463 - 2¹ = 280857461 is a prime.

Together with 280857461, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280857461) 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, 140428731 + 140428732.

It is an arithmetic number, because the mean of its divisors is an integer number (140428732).

Almost surely, 2^280857463 is an apocalyptic number.

280857463 is a deficient number, since it is larger than the sum of its proper divisors (1).

280857463 is an equidigital number, since it uses as much as digits as its factorization.

280857463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 280857463 is about 16758.8025526885. The cubic root of 280857463 is about 654.8803953863.

The spelling of 280857463 in words is "two hundred eighty million, eight hundred fifty-seven thousand, four hundred sixty-three".