85845769 has 2 divisors, whose sum is σ = 85845770. Its totient is φ = 85845768.

The previous prime is 85845763. The next prime is 85845787. The reversal of 85845769 is 96754858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79655625 + 6190144 = 8925^2 + 2488^2 .

It is a cyclic number.

It is not a de Polignac number, because 85845769 - 2²¹ = 83748617 is a prime.

It is a super-2 number, since 2×85845769² = 14738992110402722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85845763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42922884 + 42922885.

It is an arithmetic number, because the mean of its divisors is an integer number (42922885).

Almost surely, 2^85845769 is an apocalyptic number.

It is an amenable number.

85845769 is a deficient number, since it is larger than the sum of its proper divisors (1).

85845769 is an equidigital number, since it uses as much as digits as its factorization.

85845769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 52.

The square root of 85845769 is about 9265.2991856712. The cubic root of 85845769 is about 441.1364715273.

The spelling of 85845769 in words is "eighty-five million, eight hundred forty-five thousand, seven hundred sixty-nine".