84445871 has 2 divisors, whose sum is σ = 84445872. Its totient is φ = 84445870.

The previous prime is 84445853. The next prime is 84445901. The reversal of 84445871 is 17854448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84445871 - 2¹⁴ = 84429487 is a prime.

It is a super-2 number, since 2×84445871² = 14262210257897282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84445771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42222935 + 42222936.

It is an arithmetic number, because the mean of its divisors is an integer number (42222936).

Almost surely, 2^84445871 is an apocalyptic number.

84445871 is a deficient number, since it is larger than the sum of its proper divisors (1).

84445871 is an equidigital number, since it uses as much as digits as its factorization.

84445871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143360, while the sum is 41.

The square root of 84445871 is about 9189.4434543121. The cubic root of 84445871 is about 438.7254281794.

The spelling of 84445871 in words is "eighty-four million, four hundred forty-five thousand, eight hundred seventy-one".