280505053 has 2 divisors, whose sum is σ = 280505054. Its totient is φ = 280505052.

The previous prime is 280504969. The next prime is 280505059. The reversal of 280505053 is 350505082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258630724 + 21874329 = 16082^2 + 4677^2 .

It is a cyclic number.

It is not a de Polignac number, because 280505053 - 2⁹ = 280504541 is a prime.

It is equal to p_15252067 and since 280505053 and 15252067 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280505059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140252526 + 140252527.

It is an arithmetic number, because the mean of its divisors is an integer number (140252527).

Almost surely, 2^280505053 is an apocalyptic number.

It is an amenable number.

280505053 is a deficient number, since it is larger than the sum of its proper divisors (1).

280505053 is an equidigital number, since it uses as much as digits as its factorization.

280505053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 280505053 is about 16748.2850763892. The cubic root of 280505053 is about 654.6063738328.

The spelling of 280505053 in words is "two hundred eighty million, five hundred five thousand, fifty-three".