85397091 has 16 divisors (see below), whose sum is σ = 127954176. Its totient is φ = 50266656.

The previous prime is 85397089. The next prime is 85397107. The reversal of 85397091 is 19079358.

It is a happy number.

It is not a de Polignac number, because 85397091 - 2¹ = 85397089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85397051) 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 15 ways as a sum of consecutive naturals, for example, 46705 + ... + 48498.

It is an arithmetic number, because the mean of its divisors is an integer number (7997136).

Almost surely, 2^85397091 is an apocalyptic number.

85397091 is a deficient number, since it is larger than the sum of its proper divisors (42557085).

85397091 is a wasteful number, since it uses less digits than its factorization.

85397091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95242.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 85397091 is about 9241.0546476038. The cubic root of 85397091 is about 440.3665867105.

The spelling of 85397091 in words is "eighty-five million, three hundred ninety-seven thousand, ninety-one".