85172039 has 8 divisors (see below), whose sum is σ = 88327200. Its totient is φ = 82061856.

The previous prime is 85172011. The next prime is 85172063. The reversal of 85172039 is 93027158.

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

It is a de Polignac number, because none of the positive numbers 2^k-85172039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85172099) 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, 7364 + ... + 14985.

It is an arithmetic number, because the mean of its divisors is an integer number (11040900).

Almost surely, 2^85172039 is an apocalyptic number.

85172039 is a deficient number, since it is larger than the sum of its proper divisors (3155161).

85172039 is a wasteful number, since it uses less digits than its factorization.

85172039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22489.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 85172039 is about 9228.8698658070. The cubic root of 85172039 is about 439.9794050278.

The spelling of 85172039 in words is "eighty-five million, one hundred seventy-two thousand, thirty-nine".