85805957 has 4 divisors (see below), whose sum is σ = 90322080. Its totient is φ = 81289836.

The previous prime is 85805947. The next prime is 85805963. The reversal of 85805957 is 75950858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85805957 - 2²⁰ = 84757381 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 (85805927) 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 3 ways as a sum of consecutive naturals, for example, 2258033 + ... + 2258070.

It is an arithmetic number, because the mean of its divisors is an integer number (22580520).

Almost surely, 2^85805957 is an apocalyptic number.

It is an amenable number.

85805957 is a deficient number, since it is larger than the sum of its proper divisors (4516123).

85805957 is a wasteful number, since it uses less digits than its factorization.

85805957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516122.

The product of its (nonzero) digits is 504000, while the sum is 47.

The square root of 85805957 is about 9263.1504899791. The cubic root of 85805957 is about 441.0682668813.

The spelling of 85805957 in words is "eighty-five million, eight hundred five thousand, nine hundred fifty-seven".