472872809 has 4 divisors (see below), whose sum is σ = 477554820. Its totient is φ = 468190800.

The previous prime is 472872767. The next prime is 472872887. The reversal of 472872809 is 908278274.

It is a happy number.

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 288048784 + 184824025 = 16972^2 + 13595^2 .

It is a cyclic number.

It is not a de Polignac number, because 472872809 - 2¹⁶ = 472807273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (472802809) 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, 2340854 + ... + 2341055.

It is an arithmetic number, because the mean of its divisors is an integer number (119388705).

Almost surely, 2^472872809 is an apocalyptic number.

It is an amenable number.

472872809 is a deficient number, since it is larger than the sum of its proper divisors (4682011).

472872809 is a wasteful number, since it uses less digits than its factorization.

472872809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682010.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 472872809 is about 21745.6388501235. The cubic root of 472872809 is about 779.0789088893.

The spelling of 472872809 in words is "four hundred seventy-two million, eight hundred seventy-two thousand, eight hundred nine".