85620569 has 2 divisors, whose sum is σ = 85620570. Its totient is φ = 85620568.

The previous prime is 85620529. The next prime is 85620571. The reversal of 85620569 is 96502658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 150544 = 9245^2 + 388^2 .

It is a cyclic number.

It is not a de Polignac number, because 85620569 - 2¹² = 85616473 is a prime.

It is a super-2 number, since 2×85620569² = 14661763671767522, which contains 22 as substring.

Together with 85620571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85620529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42810284 + 42810285.

It is an arithmetic number, because the mean of its divisors is an integer number (42810285).

Almost surely, 2^85620569 is an apocalyptic number.

It is an amenable number.

85620569 is a deficient number, since it is larger than the sum of its proper divisors (1).

85620569 is an equidigital number, since it uses as much as digits as its factorization.

85620569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 85620569 is about 9253.1383324794. The cubic root of 85620569 is about 440.7503879290.

The spelling of 85620569 in words is "eighty-five million, six hundred twenty thousand, five hundred sixty-nine".