280473533 has 2 divisors, whose sum is σ = 280473534. Its totient is φ = 280473532.

The previous prime is 280473521. The next prime is 280473539. The reversal of 280473533 is 335374082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202009369 + 78464164 = 14213^2 + 8858^2 .

It is a cyclic number.

It is not a de Polignac number, because 280473533 - 2¹⁸ = 280211389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 280473493 and 280473502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280473539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140236766 + 140236767.

It is an arithmetic number, because the mean of its divisors is an integer number (140236767).

Almost surely, 2^280473533 is an apocalyptic number.

It is an amenable number.

280473533 is a deficient number, since it is larger than the sum of its proper divisors (1).

280473533 is an equidigital number, since it uses as much as digits as its factorization.

280473533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 280473533 is about 16747.3440580887. The cubic root of 280473533 is about 654.5818538160.

The spelling of 280473533 in words is "two hundred eighty million, four hundred seventy-three thousand, five hundred thirty-three".