85715969 has 2 divisors, whose sum is σ = 85715970. Its totient is φ = 85715968.

The previous prime is 85715941. The next prime is 85716017. The reversal of 85715969 is 96951758.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81360400 + 4355569 = 9020^2 + 2087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85715969 is a prime.

It is a super-3 number, since 3×85715969³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85715269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42857984 + 42857985.

It is an arithmetic number, because the mean of its divisors is an integer number (42857985).

Almost surely, 2^85715969 is an apocalyptic number.

It is an amenable number.

85715969 is a deficient number, since it is larger than the sum of its proper divisors (1).

85715969 is an equidigital number, since it uses as much as digits as its factorization.

85715969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 50.

The square root of 85715969 is about 9258.2919050978. The cubic root of 85715969 is about 440.9140245428.

The spelling of 85715969 in words is "eighty-five million, seven hundred fifteen thousand, nine hundred sixty-nine".