85418477 has 4 divisors (see below), whose sum is σ = 85440540. Its totient is φ = 85396416.

The previous prime is 85418461. The next prime is 85418521. The reversal of 85418477 is 77481458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77481458 = 2 ⋅38740729.

It can be written as a sum of positive squares in 2 ways, for example, as 35772361 + 49646116 = 5981^2 + 7046^2 .

It is a cyclic number.

It is not a de Polignac number, because 85418477 - 2⁴ = 85418461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85418077) 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, 3518 + ... + 13535.

It is an arithmetic number, because the mean of its divisors is an integer number (21360135).

Almost surely, 2^85418477 is an apocalyptic number.

It is an amenable number.

85418477 is a deficient number, since it is larger than the sum of its proper divisors (22063).

85418477 is a wasteful number, since it uses less digits than its factorization.

85418477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22062.

The product of its digits is 250880, while the sum is 44.

The square root of 85418477 is about 9242.2116941780. The cubic root of 85418477 is about 440.4033439882.

The spelling of 85418477 in words is "eighty-five million, four hundred eighteen thousand, four hundred seventy-seven".