85769839 has 4 divisors (see below), whose sum is σ = 88536640. Its totient is φ = 83003040.

The previous prime is 85769837. The next prime is 85769861. The reversal of 85769839 is 93896758.

It is a happy number.

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 85769839 - 2¹ = 85769837 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 85769839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85769837) 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, 1383354 + ... + 1383415.

It is an arithmetic number, because the mean of its divisors is an integer number (22134160).

Almost surely, 2^85769839 is an apocalyptic number.

85769839 is a deficient number, since it is larger than the sum of its proper divisors (2766801).

85769839 is a wasteful number, since it uses less digits than its factorization.

85769839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766800.

The product of its digits is 3265920, while the sum is 55.

The square root of 85769839 is about 9261.2007320865. The cubic root of 85769839 is about 441.0063724242.

The spelling of 85769839 in words is "eighty-five million, seven hundred sixty-nine thousand, eight hundred thirty-nine".