85783511 has 4 divisors (see below), whose sum is σ = 93582024. Its totient is φ = 77985000.

The previous prime is 85783487. The next prime is 85783567. The reversal of 85783511 is 11538758.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85783511 - 2¹⁴ = 85767127 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 (85780511) 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 3 ways as a sum of consecutive naturals, for example, 3899240 + ... + 3899261.

It is an arithmetic number, because the mean of its divisors is an integer number (23395506).

Almost surely, 2^85783511 is an apocalyptic number.

85783511 is a deficient number, since it is larger than the sum of its proper divisors (7798513).

85783511 is a wasteful number, since it uses less digits than its factorization.

85783511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7798512.

The product of its digits is 33600, while the sum is 38.

The square root of 85783511 is about 9261.9388359026. The cubic root of 85783511 is about 441.0298038108.

The spelling of 85783511 in words is "eighty-five million, seven hundred eighty-three thousand, five hundred eleven".