280264427 has 2 divisors, whose sum is σ = 280264428. Its totient is φ = 280264426.

The previous prime is 280264409. The next prime is 280264441. The reversal of 280264427 is 724462082.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280264427 is a prime.

It is a Chen prime.

It is equal to p_15239717 and since 280264427 and 15239717 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (280264487) 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, 140132213 + 140132214.

It is an arithmetic number, because the mean of its divisors is an integer number (140132214).

Almost surely, 2^280264427 is an apocalyptic number.

280264427 is a deficient number, since it is larger than the sum of its proper divisors (1).

280264427 is an equidigital number, since it uses as much as digits as its factorization.

280264427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 280264427 is about 16741.0999339948. The cubic root of 280264427 is about 654.4191396830.

The spelling of 280264427 in words is "two hundred eighty million, two hundred sixty-four thousand, four hundred twenty-seven".