280513679 has 2 divisors, whose sum is σ = 280513680. Its totient is φ = 280513678.

The previous prime is 280513633. The next prime is 280513691. The reversal of 280513679 is 976315082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 280513679 - 2⁸ = 280513423 is a prime.

It is a super-2 number, since 2×280513679² = 157375848212230082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280513579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140256839 + 140256840.

It is an arithmetic number, because the mean of its divisors is an integer number (140256840).

Almost surely, 2^280513679 is an apocalyptic number.

280513679 is a deficient number, since it is larger than the sum of its proper divisors (1).

280513679 is an equidigital number, since it uses as much as digits as its factorization.

280513679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 280513679 is about 16748.5425933124. The cubic root of 280513679 is about 654.6130838446.

The spelling of 280513679 in words is "two hundred eighty million, five hundred thirteen thousand, six hundred seventy-nine".