280868377 has 2 divisors, whose sum is σ = 280868378. Its totient is φ = 280868376.

The previous prime is 280868353. The next prime is 280868417. The reversal of 280868377 is 773868082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223472601 + 57395776 = 14949^2 + 7576^2 .

It is a cyclic number.

It is not a de Polignac number, because 280868377 - 2¹⁹ = 280344089 is a prime.

It is a super-2 number, since 2×280868377² = 157774090397228258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 280868377.

It is not a weakly prime, because it can be changed into another prime (280862377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140434188 + 140434189.

It is an arithmetic number, because the mean of its divisors is an integer number (140434189).

Almost surely, 2^280868377 is an apocalyptic number.

It is an amenable number.

280868377 is a deficient number, since it is larger than the sum of its proper divisors (1).

280868377 is an equidigital number, since it uses as much as digits as its factorization.

280868377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 49.

The square root of 280868377 is about 16759.1281694484. The cubic root of 280868377 is about 654.8888780665. Note that the first 4 decimals are identical.

It can be divided in two parts, 28086 and 8377, that added together give a palindrome (36463).

The spelling of 280868377 in words is "two hundred eighty million, eight hundred sixty-eight thousand, three hundred seventy-seven".