85155983 has 8 divisors (see below), whose sum is σ = 93018240. Its totient is φ = 77313880.

The previous prime is 85155979. The next prime is 85155989. The reversal of 85155983 is 38955158.

It is a Cunningham number, because it is equal to 9228²-1.

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 85155983 - 2² = 85155979 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85155989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4616 + ... + 13842.

It is an arithmetic number, because the mean of its divisors is an integer number (11627280).

Almost surely, 2^85155983 is an apocalyptic number.

85155983 is a deficient number, since it is larger than the sum of its proper divisors (7862257).

85155983 is a wasteful number, since it uses less digits than its factorization.

85155983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077.

The product of its digits is 216000, while the sum is 44.

The square root of 85155983 is about 9227.9999458171. Note that the first 4 decimals coincide. The cubic root of 85155983 is about 439.9517560741.

The spelling of 85155983 in words is "eighty-five million, one hundred fifty-five thousand, nine hundred eighty-three".