280137317 has 2 divisors, whose sum is σ = 280137318. Its totient is φ = 280137316.

The previous prime is 280137301. The next prime is 280137353. The reversal of 280137317 is 713731082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214300321 + 65836996 = 14639^2 + 8114^2 .

It is a cyclic number.

It is not a de Polignac number, because 280137317 - 2⁴ = 280137301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280133317) 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, 140068658 + 140068659.

It is an arithmetic number, because the mean of its divisors is an integer number (140068659).

Almost surely, 2^280137317 is an apocalyptic number.

It is an amenable number.

280137317 is a deficient number, since it is larger than the sum of its proper divisors (1).

280137317 is an equidigital number, since it uses as much as digits as its factorization.

280137317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 280137317 is about 16737.3031579165. The cubic root of 280137317 is about 654.3201905151.

Adding to 280137317 its reverse (713731082), we get a palindrome (993868399).

The spelling of 280137317 in words is "two hundred eighty million, one hundred thirty-seven thousand, three hundred seventeen".