280997338289 has 2 divisors, whose sum is σ = 280997338290. Its totient is φ = 280997338288.

The previous prime is 280997338273. The next prime is 280997338301. The reversal of 280997338289 is 982833799082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278082202225 + 2915136064 = 527335^2 + 53992^2 .

It is a cyclic number.

It is not a de Polignac number, because 280997338289 - 2⁴ = 280997338273 is a prime.

It is not a weakly prime, because it can be changed into another prime (280997338889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140498669144 + 140498669145.

It is an arithmetic number, because the mean of its divisors is an integer number (140498669145).

Almost surely, 2^280997338289 is an apocalyptic number.

It is an amenable number.

280997338289 is a deficient number, since it is larger than the sum of its proper divisors (1).

280997338289 is an equidigital number, since it uses as much as digits as its factorization.

280997338289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94058496, while the sum is 68.

The spelling of 280997338289 in words is "two hundred eighty billion, nine hundred ninety-seven million, three hundred thirty-eight thousand, two hundred eighty-nine".