85347729 has 16 divisors (see below), whose sum is σ = 128044800. Its totient is φ = 56176848.

The previous prime is 85347721. The next prime is 85347739. The reversal of 85347729 is 92774358.

It is not a de Polignac number, because 85347729 - 2³ = 85347721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85347721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17874 + ... + 22139.

It is an arithmetic number, because the mean of its divisors is an integer number (8002800).

Almost surely, 2^85347729 is an apocalyptic number.

It is an amenable number.

85347729 is a deficient number, since it is larger than the sum of its proper divisors (42697071).

85347729 is a wasteful number, since it uses less digits than its factorization.

85347729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40101 (or 40095 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 85347729 is about 9238.3834624895. The cubic root of 85347729 is about 440.2817221294.

The spelling of 85347729 in words is "eighty-five million, three hundred forty-seven thousand, seven hundred twenty-nine".