85717489 has 12 divisors (see below), whose sum is σ = 101467828. Its totient is φ = 71929440.

The previous prime is 85717487. The next prime is 85717517. The reversal of 85717489 is 98471758.

It can be written as a sum of positive squares in 2 ways, for example, as 16744464 + 68973025 = 4092^2 + 8305^2 .

It is not a de Polignac number, because 85717489 - 2¹ = 85717487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85717487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25674 + ... + 28819.

Almost surely, 2^85717489 is an apocalyptic number.

It is an amenable number.

85717489 is a deficient number, since it is larger than the sum of its proper divisors (15750339).

85717489 is a wasteful number, since it uses less digits than its factorization.

85717489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54528 (or 54517 counting only the distinct ones).

The product of its digits is 564480, while the sum is 49.

The square root of 85717489 is about 9258.3739933101. The cubic root of 85717489 is about 440.9166307680.

The spelling of 85717489 in words is "eighty-five million, seven hundred seventeen thousand, four hundred eighty-nine".