84047471 has 2 divisors, whose sum is σ = 84047472. Its totient is φ = 84047470.

The previous prime is 84047459. The next prime is 84047477. The reversal of 84047471 is 17474048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84047471 - 2⁶ = 84047407 is a prime.

It is a super-3 number, since 3×84047471³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84047477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42023735 + 42023736.

It is an arithmetic number, because the mean of its divisors is an integer number (42023736).

Almost surely, 2^84047471 is an apocalyptic number.

84047471 is a deficient number, since it is larger than the sum of its proper divisors (1).

84047471 is an equidigital number, since it uses as much as digits as its factorization.

84047471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 84047471 is about 9167.7407794941. The cubic root of 84047471 is about 438.0343985133.

The spelling of 84047471 in words is "eighty-four million, forty-seven thousand, four hundred seventy-one".