280881323 has 2 divisors, whose sum is σ = 280881324. Its totient is φ = 280881322.

The previous prime is 280881317. The next prime is 280881343. The reversal of 280881323 is 323188082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280881323 - 2¹⁸ = 280619179 is a prime.

It is a super-2 number, since 2×280881323² = 157788635220460658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (280881343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140440661 + 140440662.

It is an arithmetic number, because the mean of its divisors is an integer number (140440662).

Almost surely, 2^280881323 is an apocalyptic number.

280881323 is a deficient number, since it is larger than the sum of its proper divisors (1).

280881323 is an equidigital number, since it uses as much as digits as its factorization.

280881323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 280881323 is about 16759.5144022731. The cubic root of 280881323 is about 654.8989397915.

The spelling of 280881323 in words is "two hundred eighty million, eight hundred eighty-one thousand, three hundred twenty-three".