85805449 has 2 divisors, whose sum is σ = 85805450. Its totient is φ = 85805448.

The previous prime is 85805389. The next prime is 85805509. The reversal of 85805449 is 94450858.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (85805389) and next prime (85805509).

It can be written as a sum of positive squares in only one way, i.e., 76685049 + 9120400 = 8757^2 + 3020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85805449 is a prime.

It is not a weakly prime, because it can be changed into another prime (85805549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42902724 + 42902725.

It is an arithmetic number, because the mean of its divisors is an integer number (42902725).

Almost surely, 2^85805449 is an apocalyptic number.

It is an amenable number.

85805449 is a deficient number, since it is larger than the sum of its proper divisors (1).

85805449 is an equidigital number, since it uses as much as digits as its factorization.

85805449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 85805449 is about 9263.1230694620. The cubic root of 85805449 is about 441.0673964556.

The spelling of 85805449 in words is "eighty-five million, eight hundred five thousand, four hundred forty-nine".