85587709 has 2 divisors, whose sum is σ = 85587710. Its totient is φ = 85587708.

The previous prime is 85587679. The next prime is 85587727. The reversal of 85587709 is 90778558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60886809 + 24700900 = 7803^2 + 4970^2 .

It is a cyclic number.

It is not a de Polignac number, because 85587709 - 2⁷ = 85587581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85587769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42793854 + 42793855.

It is an arithmetic number, because the mean of its divisors is an integer number (42793855).

Almost surely, 2^85587709 is an apocalyptic number.

It is an amenable number.

85587709 is a deficient number, since it is larger than the sum of its proper divisors (1).

85587709 is an equidigital number, since it uses as much as digits as its factorization.

85587709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 85587709 is about 9251.3625482953. The cubic root of 85587709 is about 440.6939960631.

The spelling of 85587709 in words is "eighty-five million, five hundred eighty-seven thousand, seven hundred nine".