85409055 has 12 divisors (see below), whose sum is σ = 148042440. Its totient is φ = 45551472.

The previous prime is 85409041. The next prime is 85409057. The reversal of 85409055 is 55090458.

It is a happy number.

It is not a de Polignac number, because 85409055 - 2⁴ = 85409039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85409057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 948945 + ... + 949034.

It is an arithmetic number, because the mean of its divisors is an integer number (12336870).

Almost surely, 2^85409055 is an apocalyptic number.

85409055 is a deficient number, since it is larger than the sum of its proper divisors (62633385).

85409055 is a wasteful number, since it uses less digits than its factorization.

85409055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897990 (or 1897987 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 85409055 is about 9241.7019536447. The cubic root of 85409055 is about 440.3871506421.

The spelling of 85409055 in words is "eighty-five million, four hundred nine thousand, fifty-five".