84553643 has 2 divisors, whose sum is σ = 84553644. Its totient is φ = 84553642.

The previous prime is 84553537. The next prime is 84553661. The reversal of 84553643 is 34635548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84553643 - 2²⁰ = 83505067 is a prime.

It is equal to p_4919348 and since 84553643 and 4919348 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 84553597 and 84553606.

It is not a weakly prime, because it can be changed into another prime (84583643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42276821 + 42276822.

It is an arithmetic number, because the mean of its divisors is an integer number (42276822).

Almost surely, 2^84553643 is an apocalyptic number.

84553643 is a deficient number, since it is larger than the sum of its proper divisors (1).

84553643 is an equidigital number, since it uses as much as digits as its factorization.

84553643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 38.

The square root of 84553643 is about 9195.3054870407. The cubic root of 84553643 is about 438.9119864099.

The spelling of 84553643 in words is "eighty-four million, five hundred fifty-three thousand, six hundred forty-three".