85204877 has 2 divisors, whose sum is σ = 85204878. Its totient is φ = 85204876.

The previous prime is 85204859. The next prime is 85204891. The reversal of 85204877 is 77840258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73170916 + 12033961 = 8554^2 + 3469^2 .

It is a cyclic number.

It is not a de Polignac number, because 85204877 - 2⁸ = 85204621 is a 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 (85204807) 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, 42602438 + 42602439.

It is an arithmetic number, because the mean of its divisors is an integer number (42602439).

Almost surely, 2^85204877 is an apocalyptic number.

It is an amenable number.

85204877 is a deficient number, since it is larger than the sum of its proper divisors (1).

85204877 is an equidigital number, since it uses as much as digits as its factorization.

85204877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 85204877 is about 9230.6487854321. The cubic root of 85204877 is about 440.0359423118.

The spelling of 85204877 in words is "eighty-five million, two hundred four thousand, eight hundred seventy-seven".