284689397 has 2 divisors, whose sum is σ = 284689398. Its totient is φ = 284689396.

The previous prime is 284689393. The next prime is 284689417. The reversal of 284689397 is 793986482.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274697476 + 9991921 = 16574^2 + 3161^2 .

It is a cyclic number.

It is not a de Polignac number, because 284689397 - 2² = 284689393 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (284689393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142344698 + 142344699.

It is an arithmetic number, because the mean of its divisors is an integer number (142344699).

Almost surely, 2^284689397 is an apocalyptic number.

It is an amenable number.

284689397 is a deficient number, since it is larger than the sum of its proper divisors (1).

284689397 is an equidigital number, since it uses as much as digits as its factorization.

284689397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 56.

The square root of 284689397 is about 16872.7412414225. The cubic root of 284689397 is about 657.8452817868.

The spelling of 284689397 in words is "two hundred eighty-four million, six hundred eighty-nine thousand, three hundred ninety-seven".