85239129 has 8 divisors (see below), whose sum is σ = 115578720. Its totient is φ = 55862816.

The previous prime is 85239113. The next prime is 85239131. The reversal of 85239129 is 92193258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85239129 - 2⁴ = 85239113 is a prime.

It is a super-2 number, since 2×85239129² = 14531418225357282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85239169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240612 + ... + 240965.

It is an arithmetic number, because the mean of its divisors is an integer number (14447340).

Almost surely, 2^85239129 is an apocalyptic number.

It is an amenable number.

85239129 is a deficient number, since it is larger than the sum of its proper divisors (30339591).

85239129 is a wasteful number, since it uses less digits than its factorization.

85239129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481639.

The product of its digits is 38880, while the sum is 39.

The square root of 85239129 is about 9232.5039398854. The cubic root of 85239129 is about 440.0948986081.

The spelling of 85239129 in words is "eighty-five million, two hundred thirty-nine thousand, one hundred twenty-nine".