84506791 has 2 divisors, whose sum is σ = 84506792. Its totient is φ = 84506790.

The previous prime is 84506759. The next prime is 84506797. The reversal of 84506791 is 19760548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84506791 - 2⁵ = 84506759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84506797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42253395 + 42253396.

It is an arithmetic number, because the mean of its divisors is an integer number (42253396).

Almost surely, 2^84506791 is an apocalyptic number.

84506791 is a deficient number, since it is larger than the sum of its proper divisors (1).

84506791 is an equidigital number, since it uses as much as digits as its factorization.

84506791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 84506791 is about 9192.7575297078. The cubic root of 84506791 is about 438.8309029578.

The spelling of 84506791 in words is "eighty-four million, five hundred six thousand, seven hundred ninety-one".