85573861 has 2 divisors, whose sum is σ = 85573862. Its totient is φ = 85573860.

The previous prime is 85573837. The next prime is 85573871. The reversal of 85573861 is 16837558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82700836 + 2873025 = 9094^2 + 1695^2 .

It is a cyclic number.

It is not a de Polignac number, because 85573861 - 2⁹ = 85573349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85573811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42786930 + 42786931.

It is an arithmetic number, because the mean of its divisors is an integer number (42786931).

Almost surely, 2^85573861 is an apocalyptic number.

It is an amenable number.

85573861 is a deficient number, since it is larger than the sum of its proper divisors (1).

85573861 is an equidigital number, since it uses as much as digits as its factorization.

85573861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 43.

The square root of 85573861 is about 9250.6140877241. The cubic root of 85573861 is about 440.6702268416.

The spelling of 85573861 in words is "eighty-five million, five hundred seventy-three thousand, eight hundred sixty-one".