85439153 has 2 divisors, whose sum is σ = 85439154. Its totient is φ = 85439152.

The previous prime is 85439141. The next prime is 85439177. The reversal of 85439153 is 35193458.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66716224 + 18722929 = 8168^2 + 4327^2 .

It is a cyclic number.

It is not a de Polignac number, because 85439153 - 2⁸ = 85438897 is a prime.

It is not a weakly prime, because it can be changed into another prime (85439113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42719576 + 42719577.

It is an arithmetic number, because the mean of its divisors is an integer number (42719577).

Almost surely, 2^85439153 is an apocalyptic number.

It is an amenable number.

85439153 is a deficient number, since it is larger than the sum of its proper divisors (1).

85439153 is an equidigital number, since it uses as much as digits as its factorization.

85439153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 85439153 is about 9243.3301899261. The cubic root of 85439153 is about 440.4388751179.

The spelling of 85439153 in words is "eighty-five million, four hundred thirty-nine thousand, one hundred fifty-three".