84777481 has 4 divisors (see below), whose sum is σ = 85616964. Its totient is φ = 83938000.

The previous prime is 84777431. The next prime is 84777523. The reversal of 84777481 is 18477748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58675600 + 26101881 = 7660^2 + 5109^2 .

It is a cyclic number.

It is not a de Polignac number, because 84777481 - 2¹¹ = 84775433 is a prime.

It is a super-2 number, since 2×84777481² = 14374442569410722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84777401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419590 + ... + 419791.

It is an arithmetic number, because the mean of its divisors is an integer number (21404241).

Almost surely, 2^84777481 is an apocalyptic number.

It is an amenable number.

84777481 is a deficient number, since it is larger than the sum of its proper divisors (839483).

84777481 is a wasteful number, since it uses less digits than its factorization.

84777481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839482.

The product of its digits is 351232, while the sum is 46.

The square root of 84777481 is about 9207.4687618259. The cubic root of 84777481 is about 439.2989542192.

It can be divided in two parts, 84777 and 481, that added together give a palindrome (85258).

The spelling of 84777481 in words is "eighty-four million, seven hundred seventy-seven thousand, four hundred eighty-one".