280313387 has 2 divisors, whose sum is σ = 280313388. Its totient is φ = 280313386.

The previous prime is 280313381. The next prime is 280313399. The reversal of 280313387 is 783313082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280313387 - 2²⁴ = 263536171 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280313381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140156693 + 140156694.

It is an arithmetic number, because the mean of its divisors is an integer number (140156694).

Almost surely, 2^280313387 is an apocalyptic number.

280313387 is a deficient number, since it is larger than the sum of its proper divisors (1).

280313387 is an equidigital number, since it uses as much as digits as its factorization.

280313387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 280313387 is about 16742.5621396488. The cubic root of 280313387 is about 654.4572447634.

The spelling of 280313387 in words is "two hundred eighty million, three hundred thirteen thousand, three hundred eighty-seven".