85905541 has 4 divisors (see below), whose sum is σ = 85924800. Its totient is φ = 85886284.

The previous prime is 85905509. The next prime is 85905551. The reversal of 85905541 is 14550958.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14550958 = 2 ⋅7275479.

It is a cyclic number.

It is not a de Polignac number, because 85905541 - 2⁵ = 85905509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85905541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85905551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900 + ... + 13138.

It is an arithmetic number, because the mean of its divisors is an integer number (21481200).

Almost surely, 2^85905541 is an apocalyptic number.

It is an amenable number.

85905541 is a deficient number, since it is larger than the sum of its proper divisors (19259).

85905541 is a wasteful number, since it uses less digits than its factorization.

85905541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19258.

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 85905541 is about 9268.5242083085. The cubic root of 85905541 is about 441.2388314229.

The spelling of 85905541 in words is "eighty-five million, nine hundred five thousand, five hundred forty-one".