85629139 has 4 divisors (see below), whose sum is σ = 85843080. Its totient is φ = 85415200.

The previous prime is 85629133. The next prime is 85629151. The reversal of 85629139 is 93192658.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85629139 - 2⁵ = 85629107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85629095 and 85629104.

It is not an unprimeable number, because it can be changed into a prime (85629133) 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 in 3 ways as a sum of consecutive naturals, for example, 106369 + ... + 107170.

It is an arithmetic number, because the mean of its divisors is an integer number (21460770).

Almost surely, 2^85629139 is an apocalyptic number.

85629139 is a deficient number, since it is larger than the sum of its proper divisors (213941).

85629139 is a wasteful number, since it uses less digits than its factorization.

85629139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213940.

The product of its digits is 116640, while the sum is 43.

The square root of 85629139 is about 9253.6014070199. The cubic root of 85629139 is about 440.7650927476.

The spelling of 85629139 in words is "eighty-five million, six hundred twenty-nine thousand, one hundred thirty-nine".