280738039 has 2 divisors, whose sum is σ = 280738040. Its totient is φ = 280738038.

The previous prime is 280738021. The next prime is 280738063. The reversal of 280738039 is 930837082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280738039 - 2⁷ = 280737911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 280737992 and 280738010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280738739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140369019 + 140369020.

It is an arithmetic number, because the mean of its divisors is an integer number (140369020).

Almost surely, 2^280738039 is an apocalyptic number.

280738039 is a deficient number, since it is larger than the sum of its proper divisors (1).

280738039 is an equidigital number, since it uses as much as digits as its factorization.

280738039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 280738039 is about 16755.2391507850. The cubic root of 280738039 is about 654.7875611978.

The spelling of 280738039 in words is "two hundred eighty million, seven hundred thirty-eight thousand, thirty-nine".