84468409 has 2 divisors, whose sum is σ = 84468410. Its totient is φ = 84468408.

The previous prime is 84468403. The next prime is 84468457. The reversal of 84468409 is 90486448.

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., 73479184 + 10989225 = 8572^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 84468409 - 2⁹ = 84467897 is a prime.

It is not a weakly prime, because it can be changed into another prime (84468403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42234204 + 42234205.

It is an arithmetic number, because the mean of its divisors is an integer number (42234205).

Almost surely, 2^84468409 is an apocalyptic number.

It is an amenable number.

84468409 is a deficient number, since it is larger than the sum of its proper divisors (1).

84468409 is an equidigital number, since it uses as much as digits as its factorization.

84468409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 84468409 is about 9190.6696709217. The cubic root of 84468409 is about 438.7644556023.

The spelling of 84468409 in words is "eighty-four million, four hundred sixty-eight thousand, four hundred nine".