85538461 has 2 divisors, whose sum is σ = 85538462. Its totient is φ = 85538460.

The previous prime is 85538443. The next prime is 85538473. The reversal of 85538461 is 16483558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65512836 + 20025625 = 8094^2 + 4475^2 .

It is a cyclic number.

It is not a de Polignac number, because 85538461 - 2⁷ = 85538333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85538491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42769230 + 42769231.

It is an arithmetic number, because the mean of its divisors is an integer number (42769231).

Almost surely, 2^85538461 is an apocalyptic number.

It is an amenable number.

85538461 is a deficient number, since it is larger than the sum of its proper divisors (1).

85538461 is an equidigital number, since it uses as much as digits as its factorization.

85538461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The square root of 85538461 is about 9248.7005033140. The cubic root of 85538461 is about 440.6094533086.

The spelling of 85538461 in words is "eighty-five million, five hundred thirty-eight thousand, four hundred sixty-one".