280373 has 2 divisors, whose sum is σ = 280374. Its totient is φ = 280372.

The previous prime is 280351. The next prime is 280409. The reversal of 280373 is 373082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223729 + 56644 = 473^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 280373 - 2¹² = 276277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140186 + 140187.

It is an arithmetic number, because the mean of its divisors is an integer number (140187).

2²⁸⁰³⁷³ is an apocalyptic number.

It is an amenable number.

280373 is a deficient number, since it is larger than the sum of its proper divisors (1).

280373 is an equidigital number, since it uses as much as digits as its factorization.

280373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 280373 is about 529.5025967831. The cubic root of 280373 is about 65.4503634978.

The spelling of 280373 in words is "two hundred eighty thousand, three hundred seventy-three".