472778305 has 4 divisors (see below), whose sum is σ = 567333972. Its totient is φ = 378222640.

The previous prime is 472778287. The next prime is 472778309. The reversal of 472778305 is 503877274.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503877274 = 2 ⋅251938637.

It can be written as a sum of positive squares in 2 ways, for example, as 204375616 + 268402689 = 14296^2 + 16383^2 .

It is not a de Polignac number, because 472778305 - 2¹⁷ = 472647233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (472778309) 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, 47277826 + ... + 47277835.

It is an arithmetic number, because the mean of its divisors is an integer number (141833493).

Almost surely, 2^472778305 is an apocalyptic number.

It is an amenable number.

472778305 is a deficient number, since it is larger than the sum of its proper divisors (94555667).

472778305 is an equidigital number, since it uses as much as digits as its factorization.

472778305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94555666.

The product of its (nonzero) digits is 329280, while the sum is 43.

The square root of 472778305 is about 21743.4658000973. The cubic root of 472778305 is about 779.0270055888.

The spelling of 472778305 in words is "four hundred seventy-two million, seven hundred seventy-eight thousand, three hundred five".