84579877 has 2 divisors, whose sum is σ = 84579878. Its totient is φ = 84579876.

The previous prime is 84579857. The next prime is 84579883. The reversal of 84579877 is 77897548.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69455556 + 15124321 = 8334^2 + 3889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84579877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84579857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42289938 + 42289939.

It is an arithmetic number, because the mean of its divisors is an integer number (42289939).

Almost surely, 2^84579877 is an apocalyptic number.

It is an amenable number.

84579877 is a deficient number, since it is larger than the sum of its proper divisors (1).

84579877 is an equidigital number, since it uses as much as digits as its factorization.

84579877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3951360, while the sum is 55.

The square root of 84579877 is about 9196.7318651791. The cubic root of 84579877 is about 438.9573746628.

The spelling of 84579877 in words is "eighty-four million, five hundred seventy-nine thousand, eight hundred seventy-seven".