284020397 has 2 divisors, whose sum is σ = 284020398. Its totient is φ = 284020396.

The previous prime is 284020381. The next prime is 284020421. The reversal of 284020397 is 793020482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178115716 + 105904681 = 13346^2 + 10291^2 .

It is a cyclic number.

It is not a de Polignac number, because 284020397 - 2⁴ = 284020381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284020327) 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, 142010198 + 142010199.

It is an arithmetic number, because the mean of its divisors is an integer number (142010199).

Almost surely, 2^284020397 is an apocalyptic number.

It is an amenable number.

284020397 is a deficient number, since it is larger than the sum of its proper divisors (1).

284020397 is an equidigital number, since it uses as much as digits as its factorization.

284020397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 284020397 is about 16852.9047051243. The cubic root of 284020397 is about 657.3295809536.

The spelling of 284020397 in words is "two hundred eighty-four million, twenty thousand, three hundred ninety-seven".