84286409 has 2 divisors, whose sum is σ = 84286410. Its totient is φ = 84286408.

The previous prime is 84286399. The next prime is 84286439. The reversal of 84286409 is 90468248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55428025 + 28858384 = 7445^2 + 5372^2 .

It is a cyclic number.

It is not a de Polignac number, because 84286409 - 2⁴ = 84286393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84286439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42143204 + 42143205.

It is an arithmetic number, because the mean of its divisors is an integer number (42143205).

Almost surely, 2^84286409 is an apocalyptic number.

It is an amenable number.

84286409 is a deficient number, since it is larger than the sum of its proper divisors (1).

84286409 is an equidigital number, since it uses as much as digits as its factorization.

84286409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 84286409 is about 9180.7629857218. The cubic root of 84286409 is about 438.4491008089.

The spelling of 84286409 in words is "eighty-four million, two hundred eighty-six thousand, four hundred nine".