280431383 has 2 divisors, whose sum is σ = 280431384. Its totient is φ = 280431382.

The previous prime is 280431343. The next prime is 280431391. The reversal of 280431383 is 383134082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280431383 - 2¹⁴ = 280414999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280431313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140215691 + 140215692.

It is an arithmetic number, because the mean of its divisors is an integer number (140215692).

Almost surely, 2^280431383 is an apocalyptic number.

280431383 is a deficient number, since it is larger than the sum of its proper divisors (1).

280431383 is an equidigital number, since it uses as much as digits as its factorization.

280431383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 280431383 is about 16746.0856023132. The cubic root of 280431383 is about 654.5490616460.

The spelling of 280431383 in words is "two hundred eighty million, four hundred thirty-one thousand, three hundred eighty-three".