280013057 has 2 divisors, whose sum is σ = 280013058. Its totient is φ = 280013056.

The previous prime is 280013047. The next prime is 280013059. The reversal of 280013057 is 750310082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278756416 + 1256641 = 16696^2 + 1121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-280013057 is a prime.

Together with 280013059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (280013059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140006528 + 140006529.

It is an arithmetic number, because the mean of its divisors is an integer number (140006529).

Almost surely, 2^280013057 is an apocalyptic number.

It is an amenable number.

280013057 is a deficient number, since it is larger than the sum of its proper divisors (1).

280013057 is an equidigital number, since it uses as much as digits as its factorization.

280013057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 280013057 is about 16733.5906786320. The cubic root of 280013057 is about 654.2234310018.

The spelling of 280013057 in words is "two hundred eighty million, thirteen thousand, fifty-seven".