280161797 has 2 divisors, whose sum is σ = 280161798. Its totient is φ = 280161796.

The previous prime is 280161767. The next prime is 280161799. The reversal of 280161797 is 797161082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229552801 + 50608996 = 15151^2 + 7114^2 .

It is a cyclic number.

It is not a de Polignac number, because 280161797 - 2²² = 275967493 is a prime.

Together with 280161799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280161799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140080898 + 140080899.

It is an arithmetic number, because the mean of its divisors is an integer number (140080899).

Almost surely, 2^280161797 is an apocalyptic number.

It is an amenable number.

280161797 is a deficient number, since it is larger than the sum of its proper divisors (1).

280161797 is an equidigital number, since it uses as much as digits as its factorization.

280161797 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 280161797 is about 16738.0344425503. The cubic root of 280161797 is about 654.3392493727.

The spelling of 280161797 in words is "two hundred eighty million, one hundred sixty-one thousand, seven hundred ninety-seven".