280404029 has 2 divisors, whose sum is σ = 280404030. Its totient is φ = 280404028.

The previous prime is 280403993. The next prime is 280404031. The reversal of 280404029 is 920404082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151240804 + 129163225 = 12298^2 + 11365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280404029 is a prime.

Together with 280404031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 280403992 and 280404010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280404329) 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, 140202014 + 140202015.

It is an arithmetic number, because the mean of its divisors is an integer number (140202015).

Almost surely, 2^280404029 is an apocalyptic number.

It is an amenable number.

280404029 is a deficient number, since it is larger than the sum of its proper divisors (1).

280404029 is an equidigital number, since it uses as much as digits as its factorization.

280404029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 280404029 is about 16745.2688542167. The cubic root of 280404029 is about 654.5277788197.

The spelling of 280404029 in words is "two hundred eighty million, four hundred four thousand, twenty-nine".