84643469 has 2 divisors, whose sum is σ = 84643470. Its totient is φ = 84643468.

The previous prime is 84643463. The next prime is 84643477. The reversal of 84643469 is 96434648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75864100 + 8779369 = 8710^2 + 2963^2 .

It is a cyclic number.

It is not a de Polignac number, because 84643469 - 2⁴ = 84643453 is a prime.

It is a super-2 number, since 2×84643469² = 14329033688707922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84643463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42321734 + 42321735.

It is an arithmetic number, because the mean of its divisors is an integer number (42321735).

Almost surely, 2^84643469 is an apocalyptic number.

It is an amenable number.

84643469 is a deficient number, since it is larger than the sum of its proper divisors (1).

84643469 is an equidigital number, since it uses as much as digits as its factorization.

84643469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 44.

The square root of 84643469 is about 9200.1885306770. The cubic root of 84643469 is about 439.0673582092.

The spelling of 84643469 in words is "eighty-four million, six hundred forty-three thousand, four hundred sixty-nine".