85872731 has 8 divisors (see below), whose sum is σ = 102407424. Its totient is φ = 70404840.

The previous prime is 85872719. The next prime is 85872749. The reversal of 85872731 is 13727858.

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-85872731 is a prime.

It is a super-2 number, since 2×85872731² = 14748251858796722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85872751) 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 7 ways as a sum of consecutive naturals, for example, 266525 + ... + 266846.

It is an arithmetic number, because the mean of its divisors is an integer number (12800928).

Almost surely, 2^85872731 is an apocalyptic number.

85872731 is a deficient number, since it is larger than the sum of its proper divisors (16534693).

85872731 is a wasteful number, since it uses less digits than its factorization.

85872731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533401.

The product of its digits is 94080, while the sum is 41.

The square root of 85872731 is about 9266.7540703312. The cubic root of 85872731 is about 441.1826499886.

The spelling of 85872731 in words is "eighty-five million, eight hundred seventy-two thousand, seven hundred thirty-one".