85364869 has 2 divisors, whose sum is σ = 85364870. Its totient is φ = 85364868.

The previous prime is 85364857. The next prime is 85364879. The reversal of 85364869 is 96846358.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78552769 + 6812100 = 8863^2 + 2610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85364869 is a prime.

It is a super-2 number, since 2×85364869² = 14574321718774322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85364879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42682434 + 42682435.

It is an arithmetic number, because the mean of its divisors is an integer number (42682435).

Almost surely, 2^85364869 is an apocalyptic number.

It is an amenable number.

85364869 is a deficient number, since it is larger than the sum of its proper divisors (1).

85364869 is an equidigital number, since it uses as much as digits as its factorization.

85364869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 49.

The square root of 85364869 is about 9239.3110673903. The cubic root of 85364869 is about 440.3111934216.

The spelling of 85364869 in words is "eighty-five million, three hundred sixty-four thousand, eight hundred sixty-nine".