85500061 has 2 divisors, whose sum is σ = 85500062. Its totient is φ = 85500060.

The previous prime is 85500059. The next prime is 85500071. The reversal of 85500061 is 16000558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54908100 + 30591961 = 7410^2 + 5531^2 .

It is a cyclic number.

It is not a de Polignac number, because 85500061 - 2¹ = 85500059 is a prime.

Together with 85500059, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 85499999 and 85500035.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85500001) 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, 42750030 + 42750031.

It is an arithmetic number, because the mean of its divisors is an integer number (42750031).

Almost surely, 2^85500061 is an apocalyptic number.

It is an amenable number.

85500061 is a deficient number, since it is larger than the sum of its proper divisors (1).

85500061 is an equidigital number, since it uses as much as digits as its factorization.

85500061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 85500061 is about 9246.6243029551. The cubic root of 85500061 is about 440.5435105141.

The spelling of 85500061 in words is "eighty-five million, five hundred thousand, sixty-one".