85248729 has 12 divisors (see below), whose sum is σ = 127109632. Its totient is φ = 54999000.

The previous prime is 85248721. The next prime is 85248767. The reversal of 85248729 is 92784258.

It is not a de Polignac number, because 85248729 - 2³ = 85248721 is a prime.

It is a super-2 number, since 2×85248729² = 14534691592230882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85248721) 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 11 ways as a sum of consecutive naturals, for example, 152497 + ... + 153054.

Almost surely, 2^85248729 is an apocalyptic number.

It is an amenable number.

85248729 is a deficient number, since it is larger than the sum of its proper divisors (41860903).

85248729 is a wasteful number, since it uses less digits than its factorization.

85248729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305588 (or 305585 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 85248729 is about 9233.0238275443. The cubic root of 85248729 is about 440.1114197859. Note that the first 3 decimals are identical.

The spelling of 85248729 in words is "eighty-five million, two hundred forty-eight thousand, seven hundred twenty-nine".