280947343 has 2 divisors, whose sum is σ = 280947344. Its totient is φ = 280947342.

The previous prime is 280947311. The next prime is 280947347. The reversal of 280947343 is 343749082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280947343 - 2⁵ = 280947311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 280947296 and 280947305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280947347) 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, 140473671 + 140473672.

It is an arithmetic number, because the mean of its divisors is an integer number (140473672).

Almost surely, 2^280947343 is an apocalyptic number.

280947343 is a deficient number, since it is larger than the sum of its proper divisors (1).

280947343 is an equidigital number, since it uses as much as digits as its factorization.

280947343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 280947343 is about 16761.4839140215. The cubic root of 280947343 is about 654.9502462062.

The spelling of 280947343 in words is "two hundred eighty million, nine hundred forty-seven thousand, three hundred forty-three".