85999429 has 4 divisors (see below), whose sum is σ = 86198476. Its totient is φ = 85800384.

The previous prime is 85999409. The next prime is 85999457. The reversal of 85999429 is 92499958.

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 46648900 + 39350529 = 6830^2 + 6273^2 .

It is a cyclic number.

It is not a de Polignac number, because 85999429 - 2⁹ = 85998917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85999429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85999409) 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, 98874 + ... + 99739.

It is an arithmetic number, because the mean of its divisors is an integer number (21549619).

Almost surely, 2^85999429 is an apocalyptic number.

It is an amenable number.

85999429 is a deficient number, since it is larger than the sum of its proper divisors (199047).

85999429 is a wasteful number, since it uses less digits than its factorization.

85999429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199046.

The product of its digits is 2099520, while the sum is 55.

The square root of 85999429 is about 9273.5877091879. The cubic root of 85999429 is about 441.3995193441.

The spelling of 85999429 in words is "eighty-five million, nine hundred ninety-nine thousand, four hundred twenty-nine".