85318469 has 2 divisors, whose sum is σ = 85318470. Its totient is φ = 85318468.

The previous prime is 85318451. The next prime is 85318481. The reversal of 85318469 is 96481358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 35545444 = 7055^2 + 5962^2 .

It is a cyclic number.

It is not a de Polignac number, because 85318469 - 2⁸ = 85318213 is a prime.

It is a super-2 number, since 2×85318469² = 14558482305007922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85318369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42659234 + 42659235.

It is an arithmetic number, because the mean of its divisors is an integer number (42659235).

Almost surely, 2^85318469 is an apocalyptic number.

It is an amenable number.

85318469 is a deficient number, since it is larger than the sum of its proper divisors (1).

85318469 is an equidigital number, since it uses as much as digits as its factorization.

85318469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 85318469 is about 9236.7997163520. The cubic root of 85318469 is about 440.2314020415.

The spelling of 85318469 in words is "eighty-five million, three hundred eighteen thousand, four hundred sixty-nine".