280828213 has 2 divisors, whose sum is σ = 280828214. Its totient is φ = 280828212.

The previous prime is 280828181. The next prime is 280828277. The reversal of 280828213 is 312828082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145757329 + 135070884 = 12073^2 + 11622^2 .

It is a cyclic number.

It is not a de Polignac number, because 280828213 - 2⁵ = 280828181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280828913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140414106 + 140414107.

It is an arithmetic number, because the mean of its divisors is an integer number (140414107).

Almost surely, 2^280828213 is an apocalyptic number.

It is an amenable number.

280828213 is a deficient number, since it is larger than the sum of its proper divisors (1).

280828213 is an equidigital number, since it uses as much as digits as its factorization.

280828213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 280828213 is about 16757.9298542511. The cubic root of 280828213 is about 654.8576603468.

The spelling of 280828213 in words is "two hundred eighty million, eight hundred twenty-eight thousand, two hundred thirteen".