280394423 has 2 divisors, whose sum is σ = 280394424. Its totient is φ = 280394422.

The previous prime is 280394363. The next prime is 280394431. The reversal of 280394423 is 324493082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280394423 - 2¹⁶ = 280328887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280390423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140197211 + 140197212.

It is an arithmetic number, because the mean of its divisors is an integer number (140197212).

Almost surely, 2^280394423 is an apocalyptic number.

280394423 is a deficient number, since it is larger than the sum of its proper divisors (1).

280394423 is an equidigital number, since it uses as much as digits as its factorization.

280394423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 280394423 is about 16744.9820244753. The cubic root of 280394423 is about 654.5203045267.

The spelling of 280394423 in words is "two hundred eighty million, three hundred ninety-four thousand, four hundred twenty-three".