85820029 has 4 divisors (see below), whose sum is σ = 90868284. Its totient is φ = 80771776.

The previous prime is 85820023. The next prime is 85820087. The reversal of 85820029 is 92002858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79619929 + 6200100 = 8923^2 + 2490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85820029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85819976 and 85820003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85820023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2524102 + ... + 2524135.

It is an arithmetic number, because the mean of its divisors is an integer number (22717071).

Almost surely, 2^85820029 is an apocalyptic number.

It is an amenable number.

85820029 is a deficient number, since it is larger than the sum of its proper divisors (5048255).

85820029 is a wasteful number, since it uses less digits than its factorization.

85820029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048254.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 85820029 is about 9263.9100276287. The cubic root of 85820029 is about 441.0923769921.

The spelling of 85820029 in words is "eighty-five million, eight hundred twenty thousand, twenty-nine".