85783969 has 4 divisors (see below), whose sum is σ = 85803844. Its totient is φ = 85764096.

The previous prime is 85783939. The next prime is 85783991. The reversal of 85783969 is 96938758.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62599744 + 23184225 = 7912^2 + 4815^2 .

It is a cyclic number.

It is not a de Polignac number, because 85783969 - 2⁵ = 85783937 is a prime.

It is a super-2 number, since 2×85783969² = 14717778674785922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85783939) 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, 432 + ... + 13105.

It is an arithmetic number, because the mean of its divisors is an integer number (21450961).

Almost surely, 2^85783969 is an apocalyptic number.

It is an amenable number.

85783969 is a deficient number, since it is larger than the sum of its proper divisors (19875).

85783969 is a wasteful number, since it uses less digits than its factorization.

85783969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19874.

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

The square root of 85783969 is about 9261.9635607143. The cubic root of 85783969 is about 441.0305886986.

The spelling of 85783969 in words is "eighty-five million, seven hundred eighty-three thousand, nine hundred sixty-nine".