284248981 has 4 divisors (see below), whose sum is σ = 294050700. Its totient is φ = 274447264.

The previous prime is 284248871. The next prime is 284248999. The reversal of 284248981 is 189842482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189842482 = 2 ⋅94921241.

It can be written as a sum of positive squares in 2 ways, for example, as 80730225 + 203518756 = 8985^2 + 14266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-284248981 is a prime.

It is a super-2 number, since 2×284248981² = 161594966399076722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284248681) 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, 4900816 + ... + 4900873.

It is an arithmetic number, because the mean of its divisors is an integer number (73512675).

Almost surely, 2^284248981 is an apocalyptic number.

It is an amenable number.

284248981 is a deficient number, since it is larger than the sum of its proper divisors (9801719).

284248981 is an equidigital number, since it uses as much as digits as its factorization.

284248981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9801718.

The product of its digits is 294912, while the sum is 46.

The square root of 284248981 is about 16859.6850800957. The cubic root of 284248981 is about 657.5058766649.

The spelling of 284248981 in words is "two hundred eighty-four million, two hundred forty-eight thousand, nine hundred eighty-one".