84579791 has 2 divisors, whose sum is σ = 84579792. Its totient is φ = 84579790.

The previous prime is 84579769. The next prime is 84579851. The reversal of 84579791 is 19797548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84579791 - 2⁶ = 84579727 is a prime.

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 (84579751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42289895 + 42289896.

It is an arithmetic number, because the mean of its divisors is an integer number (42289896).

Almost surely, 2^84579791 is an apocalyptic number.

84579791 is a deficient number, since it is larger than the sum of its proper divisors (1).

84579791 is an equidigital number, since it uses as much as digits as its factorization.

84579791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 50.

The square root of 84579791 is about 9196.7271896039. The cubic root of 84579791 is about 438.9572258869.

The spelling of 84579791 in words is "eighty-four million, five hundred seventy-nine thousand, seven hundred ninety-one".