280074913 has 4 divisors (see below), whose sum is σ = 281793328. Its totient is φ = 278356500.

The previous prime is 280074911. The next prime is 280074923. The reversal of 280074913 is 319470082.

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 280074913 - 2¹ = 280074911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280074911) 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, 858963 + ... + 859288.

It is an arithmetic number, because the mean of its divisors is an integer number (70448332).

Almost surely, 2^280074913 is an apocalyptic number.

It is an amenable number.

280074913 is a deficient number, since it is larger than the sum of its proper divisors (1718415).

280074913 is a wasteful number, since it uses less digits than its factorization.

280074913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718414.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 280074913 is about 16735.4388349992. The cubic root of 280074913 is about 654.2716009758.

The spelling of 280074913 in words is "two hundred eighty million, seventy-four thousand, nine hundred thirteen".