85429661 has 2 divisors, whose sum is σ = 85429662. Its totient is φ = 85429660.

The previous prime is 85429651. The next prime is 85429703. The reversal of 85429661 is 16692458.

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., 43309561 + 42120100 = 6581^2 + 6490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85429661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85429651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42714830 + 42714831.

It is an arithmetic number, because the mean of its divisors is an integer number (42714831).

Almost surely, 2^85429661 is an apocalyptic number.

It is an amenable number.

85429661 is a deficient number, since it is larger than the sum of its proper divisors (1).

85429661 is an equidigital number, since it uses as much as digits as its factorization.

85429661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 85429661 is about 9242.8167243541. The cubic root of 85429661 is about 440.4225640923.

The spelling of 85429661 in words is "eighty-five million, four hundred twenty-nine thousand, six hundred sixty-one".