85429429 has 4 divisors (see below), whose sum is σ = 89143776. Its totient is φ = 81715084.

The previous prime is 85429417. The next prime is 85429451. The reversal of 85429429 is 92492458.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85429429 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85421429) 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, 1857139 + ... + 1857184.

It is an arithmetic number, because the mean of its divisors is an integer number (22285944).

Almost surely, 2^85429429 is an apocalyptic number.

It is an amenable number.

85429429 is a deficient number, since it is larger than the sum of its proper divisors (3714347).

85429429 is a wasteful number, since it uses less digits than its factorization.

85429429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714346.

The product of its digits is 207360, while the sum is 43.

The square root of 85429429 is about 9242.8041740589. The cubic root of 85429429 is about 440.4221654090.

It can be divided in two parts, 85429 and 429, that added together give a palindrome (85858).

The spelling of 85429429 in words is "eighty-five million, four hundred twenty-nine thousand, four hundred twenty-nine".