42904777 has 4 divisors (see below), whose sum is σ = 43608196. Its totient is φ = 42201360.

The previous prime is 42904769. The next prime is 42904861. The reversal of 42904777 is 77740924.

42904777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1121481 + 41783296 = 1059^2 + 6464^2 .

It is a cyclic number.

It is not a de Polignac number, because 42904777 - 2³ = 42904769 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (42904577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351618 + ... + 351739.

It is an arithmetic number, because the mean of its divisors is an integer number (10902049).

Almost surely, 2^42904777 is an apocalyptic number.

It is an amenable number.

42904777 is a deficient number, since it is larger than the sum of its proper divisors (703419).

42904777 is an equidigital number, since it uses as much as digits as its factorization.

42904777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703418.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 42904777 is about 6550.1738144877. The cubic root of 42904777 is about 350.0810070999.

It can be divided in two parts, 42904 and 777, that added together give a square (43681 = 209²).

The spelling of 42904777 in words is "forty-two million, nine hundred four thousand, seven hundred seventy-seven".