85863709 has 2 divisors, whose sum is σ = 85863710. Its totient is φ = 85863708.

The previous prime is 85863677. The next prime is 85863773. The reversal of 85863709 is 90736858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44222500 + 41641209 = 6650^2 + 6453^2 .

It is a cyclic number.

It is not a de Polignac number, because 85863709 - 2⁵ = 85863677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85863409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42931854 + 42931855.

It is an arithmetic number, because the mean of its divisors is an integer number (42931855).

Almost surely, 2^85863709 is an apocalyptic number.

It is an amenable number.

85863709 is a deficient number, since it is larger than the sum of its proper divisors (1).

85863709 is an equidigital number, since it uses as much as digits as its factorization.

85863709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 85863709 is about 9266.2672635749. The cubic root of 85863709 is about 441.1671988699.

The spelling of 85863709 in words is "eighty-five million, eight hundred sixty-three thousand, seven hundred nine".