85569427 has 2 divisors, whose sum is σ = 85569428. Its totient is φ = 85569426.

The previous prime is 85569391. The next prime is 85569443. The reversal of 85569427 is 72496558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85569427 is a prime.

It is not a weakly prime, because it can be changed into another prime (85569457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42784713 + 42784714.

It is an arithmetic number, because the mean of its divisors is an integer number (42784714).

Almost surely, 2^85569427 is an apocalyptic number.

85569427 is a deficient number, since it is larger than the sum of its proper divisors (1).

85569427 is an equidigital number, since it uses as much as digits as its factorization.

85569427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The square root of 85569427 is about 9250.3744248544. The cubic root of 85569427 is about 440.6626156174.

The spelling of 85569427 in words is "eighty-five million, five hundred sixty-nine thousand, four hundred twenty-seven".