85716149 has 2 divisors, whose sum is σ = 85716150. Its totient is φ = 85716148.

The previous prime is 85716139. The next prime is 85716179. The reversal of 85716149 is 94161758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82174225 + 3541924 = 9065^2 + 1882^2 .

It is a cyclic number.

It is not a de Polignac number, because 85716149 - 2⁴ = 85716133 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85716139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42858074 + 42858075.

It is an arithmetic number, because the mean of its divisors is an integer number (42858075).

Almost surely, 2^85716149 is an apocalyptic number.

It is an amenable number.

85716149 is a deficient number, since it is larger than the sum of its proper divisors (1).

85716149 is an equidigital number, since it uses as much as digits as its factorization.

85716149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 85716149 is about 9258.3016261083. The cubic root of 85716149 is about 440.9143331763.

The spelling of 85716149 in words is "eighty-five million, seven hundred sixteen thousand, one hundred forty-nine".