280680233 has 2 divisors, whose sum is σ = 280680234. Its totient is φ = 280680232.

The previous prime is 280680181. The next prime is 280680263. The reversal of 280680233 is 332086082.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252079129 + 28601104 = 15877^2 + 5348^2 .

It is a cyclic number.

It is not a de Polignac number, because 280680233 - 2⁸ = 280679977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 280680233.

It is not a weakly prime, because it can be changed into another prime (280680263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140340116 + 140340117.

It is an arithmetic number, because the mean of its divisors is an integer number (140340117).

Almost surely, 2^280680233 is an apocalyptic number.

It is an amenable number.

280680233 is a deficient number, since it is larger than the sum of its proper divisors (1).

280680233 is an equidigital number, since it uses as much as digits as its factorization.

280680233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 280680233 is about 16753.5140492972. The cubic root of 280680233 is about 654.7426162756.

The spelling of 280680233 in words is "two hundred eighty million, six hundred eighty thousand, two hundred thirty-three".