280066513 has 4 divisors (see below), whose sum is σ = 282081520. Its totient is φ = 278051508.

The previous prime is 280066487. The next prime is 280066519. The reversal of 280066513 is 315660082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 280066513 - 2⁵ = 280066481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280066519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007295 + ... + 1007572.

It is an arithmetic number, because the mean of its divisors is an integer number (70520380).

Almost surely, 2^280066513 is an apocalyptic number.

It is an amenable number.

280066513 is a deficient number, since it is larger than the sum of its proper divisors (2015007).

280066513 is a wasteful number, since it uses less digits than its factorization.

280066513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015006.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 280066513 is about 16735.1878686796. The cubic root of 280066513 is about 654.2650599444.

The spelling of 280066513 in words is "two hundred eighty million, sixty-six thousand, five hundred thirteen".