84638471 has 2 divisors, whose sum is σ = 84638472. Its totient is φ = 84638470.

The previous prime is 84638453. The next prime is 84638497. The reversal of 84638471 is 17483648.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84638471 - 2²⁶ = 17529607 is a prime.

It is a super-3 number, since 3×84638471³ (a number of 25 digits) contains 333 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 (84634471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42319235 + 42319236.

It is an arithmetic number, because the mean of its divisors is an integer number (42319236).

Almost surely, 2^84638471 is an apocalyptic number.

84638471 is a deficient number, since it is larger than the sum of its proper divisors (1).

84638471 is an equidigital number, since it uses as much as digits as its factorization.

84638471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 41.

The square root of 84638471 is about 9199.9169017986. The cubic root of 84638471 is about 439.0587160703.

The spelling of 84638471 in words is "eighty-four million, six hundred thirty-eight thousand, four hundred seventy-one".