84016591 has 2 divisors, whose sum is σ = 84016592. Its totient is φ = 84016590.

The previous prime is 84016577. The next prime is 84016619. The reversal of 84016591 is 19561048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84016591 - 2⁷ = 84016463 is a prime.

It is a super-2 number, since 2×84016591² = 14117575126522562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84016561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42008295 + 42008296.

It is an arithmetic number, because the mean of its divisors is an integer number (42008296).

Almost surely, 2^84016591 is an apocalyptic number.

84016591 is a deficient number, since it is larger than the sum of its proper divisors (1).

84016591 is an equidigital number, since it uses as much as digits as its factorization.

84016591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 84016591 is about 9166.0564584777. The cubic root of 84016591 is about 437.9807456629.

The spelling of 84016591 in words is "eighty-four million, sixteen thousand, five hundred ninety-one".