284809913 has 2 divisors, whose sum is σ = 284809914. Its totient is φ = 284809912.

The previous prime is 284809883. The next prime is 284809919. The reversal of 284809913 is 319908482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262180864 + 22629049 = 16192^2 + 4757^2 .

It is a cyclic number.

It is not a de Polignac number, because 284809913 - 2¹⁴ = 284793529 is a prime.

It is a super-2 number, since 2×284809913² = 162233373086135138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (284809919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142404956 + 142404957.

It is an arithmetic number, because the mean of its divisors is an integer number (142404957).

Almost surely, 2^284809913 is an apocalyptic number.

It is an amenable number.

284809913 is a deficient number, since it is larger than the sum of its proper divisors (1).

284809913 is an equidigital number, since it uses as much as digits as its factorization.

284809913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 284809913 is about 16876.3121860198. The cubic root of 284809913 is about 657.9380960354.

The spelling of 284809913 in words is "two hundred eighty-four million, eight hundred nine thousand, nine hundred thirteen".