85180091 has 8 divisors (see below), whose sum is σ = 86476800. Its totient is φ = 83889000.

The previous prime is 85180087. The next prime is 85180103. The reversal of 85180091 is 19008158.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85180091 - 2² = 85180087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85180391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36716 + ... + 38966.

It is an arithmetic number, because the mean of its divisors is an integer number (10809600).

Almost surely, 2^85180091 is an apocalyptic number.

85180091 is a deficient number, since it is larger than the sum of its proper divisors (1296709).

85180091 is a wasteful number, since it uses less digits than its factorization.

85180091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 85180091 is about 9229.3060952598. The cubic root of 85180091 is about 439.9932695251.

The spelling of 85180091 in words is "eighty-five million, one hundred eighty thousand, ninety-one".