85516493 has 4 divisors (see below), whose sum is σ = 85849500. Its totient is φ = 85183488.

The previous prime is 85516463. The next prime is 85516513. The reversal of 85516493 is 39461558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39461558 = 2 ⋅19730779.

It can be written as a sum of positive squares in 2 ways, for example, as 76772644 + 8743849 = 8762^2 + 2957^2 .

It is a cyclic number.

It is not a de Polignac number, because 85516493 - 2⁸ = 85516237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85516493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85516463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166118 + ... + 166631.

It is an arithmetic number, because the mean of its divisors is an integer number (21462375).

Almost surely, 2^85516493 is an apocalyptic number.

It is an amenable number.

85516493 is a deficient number, since it is larger than the sum of its proper divisors (333007).

85516493 is a wasteful number, since it uses less digits than its factorization.

85516493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333006.

The product of its digits is 129600, while the sum is 41.

The square root of 85516493 is about 9247.5128007481. The cubic root of 85516493 is about 440.5717309511.

The spelling of 85516493 in words is "eighty-five million, five hundred sixteen thousand, four hundred ninety-three".