85918069 has 2 divisors, whose sum is σ = 85918070. Its totient is φ = 85918068.

The previous prime is 85918067. The next prime is 85918099. The reversal of 85918069 is 96081958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54982225 + 30935844 = 7415^2 + 5562^2 .

It is a cyclic number.

It is not a de Polignac number, because 85918069 - 2¹ = 85918067 is a prime.

It is a super-2 number, since 2×85918069² = 14763829161377522, which contains 22 as substring.

Together with 85918067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85918067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42959034 + 42959035.

It is an arithmetic number, because the mean of its divisors is an integer number (42959035).

Almost surely, 2^85918069 is an apocalyptic number.

It is an amenable number.

85918069 is a deficient number, since it is larger than the sum of its proper divisors (1).

85918069 is an equidigital number, since it uses as much as digits as its factorization.

85918069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 85918069 is about 9269.2000194192. The cubic root of 85918069 is about 441.2602796761.

The spelling of 85918069 in words is "eighty-five million, nine hundred eighteen thousand, sixty-nine".