280797161 has 2 divisors, whose sum is σ = 280797162. Its totient is φ = 280797160.

The previous prime is 280797149. The next prime is 280797173. The reversal of 280797161 is 161797082.

It is a balanced prime because it is at equal distance from previous prime (280797149) and next prime (280797173).

It can be written as a sum of positive squares in only one way, i.e., 278890000 + 1907161 = 16700^2 + 1381^2 .

It is a cyclic number.

It is not a de Polignac number, because 280797161 - 2¹⁰ = 280796137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280797061) 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, 140398580 + 140398581.

It is an arithmetic number, because the mean of its divisors is an integer number (140398581).

Almost surely, 2^280797161 is an apocalyptic number.

It is an amenable number.

280797161 is a deficient number, since it is larger than the sum of its proper divisors (1).

280797161 is an equidigital number, since it uses as much as digits as its factorization.

280797161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 280797161 is about 16757.0033418866. The cubic root of 280797161 is about 654.8335229458.

The spelling of 280797161 in words is "two hundred eighty million, seven hundred ninety-seven thousand, one hundred sixty-one".