84478469 has 2 divisors, whose sum is σ = 84478470. Its totient is φ = 84478468.

The previous prime is 84478463. The next prime is 84478477. The reversal of 84478469 is 96487448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84364225 + 114244 = 9185^2 + 338^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84478469 is a prime.

It is a super-2 number, since 2×84478469² = 14273223449167922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84478463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42239234 + 42239235.

It is an arithmetic number, because the mean of its divisors is an integer number (42239235).

Almost surely, 2^84478469 is an apocalyptic number.

It is an amenable number.

84478469 is a deficient number, since it is larger than the sum of its proper divisors (1).

84478469 is an equidigital number, since it uses as much as digits as its factorization.

84478469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 50.

The square root of 84478469 is about 9191.2169488050. The cubic root of 84478469 is about 438.7818735350.

The spelling of 84478469 in words is "eighty-four million, four hundred seventy-eight thousand, four hundred sixty-nine".