85424777 has 4 divisors (see below), whose sum is σ = 85990656. Its totient is φ = 84858900.

The previous prime is 85424753. The next prime is 85424797. The reversal of 85424777 is 77742458.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77742458 = 2 ⋅38871229.

It is a cyclic number.

It is not a de Polignac number, because 85424777 - 2¹⁸ = 85162633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85424797) 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, 282713 + ... + 283014.

It is an arithmetic number, because the mean of its divisors is an integer number (21497664).

Almost surely, 2^85424777 is an apocalyptic number.

It is an amenable number.

85424777 is a deficient number, since it is larger than the sum of its proper divisors (565879).

85424777 is a wasteful number, since it uses less digits than its factorization.

85424777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565878.

The product of its digits is 439040, while the sum is 44.

The square root of 85424777 is about 9242.5525154040. The cubic root of 85424777 is about 440.4141709699.

The spelling of 85424777 in words is "eighty-five million, four hundred twenty-four thousand, seven hundred seventy-seven".