283878013 has 4 divisors (see below), whose sum is σ = 293666940. Its totient is φ = 274089088.

The previous prime is 283877999. The next prime is 283878043. The reversal of 283878013 is 310878382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310878382 = 2 ⋅155439191.

It can be written as a sum of positive squares in 2 ways, for example, as 117029124 + 166848889 = 10818^2 + 12917^2 .

It is a cyclic number.

It is not a de Polignac number, because 283878013 - 2¹⁷ = 283746941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283878043) 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, 4894420 + ... + 4894477.

It is an arithmetic number, because the mean of its divisors is an integer number (73416735).

Almost surely, 2^283878013 is an apocalyptic number.

It is an amenable number.

283878013 is a deficient number, since it is larger than the sum of its proper divisors (9788927).

283878013 is an equidigital number, since it uses as much as digits as its factorization.

283878013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9788926.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 283878013 is about 16848.6798592649. The cubic root of 283878013 is about 657.2197192907.

The spelling of 283878013 in words is "two hundred eighty-three million, eight hundred seventy-eight thousand, thirteen".