85328691 has 32 divisors (see below), whose sum is σ = 134515200. Its totient is φ = 47105280.

The previous prime is 85328681. The next prime is 85328693. The reversal of 85328691 is 19682358.

It is not a de Polignac number, because 85328691 - 2¹⁰ = 85327667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85328693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75015 + ... + 76143.

It is an arithmetic number, because the mean of its divisors is an integer number (4203600).

Almost surely, 2^85328691 is an apocalyptic number.

85328691 is a deficient number, since it is larger than the sum of its proper divisors (49186509).

85328691 is a wasteful number, since it uses less digits than its factorization.

85328691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259.

The product of its digits is 103680, while the sum is 42.

The square root of 85328691 is about 9237.3530299540. The cubic root of 85328691 is about 440.2489827042.

The spelling of 85328691 in words is "eighty-five million, three hundred twenty-eight thousand, six hundred ninety-one".