85438061 has 2 divisors, whose sum is σ = 85438062. Its totient is φ = 85438060.

The previous prime is 85438049. The next prime is 85438081. The reversal of 85438061 is 16083458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79032100 + 6405961 = 8890^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 85438061 - 2⁶ = 85437997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85438081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42719030 + 42719031.

It is an arithmetic number, because the mean of its divisors is an integer number (42719031).

Almost surely, 2^85438061 is an apocalyptic number.

It is an amenable number.

85438061 is a deficient number, since it is larger than the sum of its proper divisors (1).

85438061 is an equidigital number, since it uses as much as digits as its factorization.

85438061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 85438061 is about 9243.2711201176. The cubic root of 85438061 is about 440.4369986897.

The spelling of 85438061 in words is "eighty-five million, four hundred thirty-eight thousand, sixty-one".