85471129 has 2 divisors, whose sum is σ = 85471130. Its totient is φ = 85471128.

The previous prime is 85471109. The next prime is 85471171. The reversal of 85471129 is 92117458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63568729 + 21902400 = 7973^2 + 4680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85471129 is a prime.

It is equal to p_4969531 and since 85471129 and 4969531 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85471109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42735564 + 42735565.

It is an arithmetic number, because the mean of its divisors is an integer number (42735565).

Almost surely, 2^85471129 is an apocalyptic number.

It is an amenable number.

85471129 is a deficient number, since it is larger than the sum of its proper divisors (1).

85471129 is an equidigital number, since it uses as much as digits as its factorization.

85471129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 85471129 is about 9245.0597077574. The cubic root of 85471129 is about 440.4938136966.

The spelling of 85471129 in words is "eighty-five million, four hundred seventy-one thousand, one hundred twenty-nine".