470644021 has 4 divisors (see below), whose sum is σ = 470692044. Its totient is φ = 470596000.

The previous prime is 470643991. The next prime is 470644037. The reversal of 470644021 is 120446074.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 67076100 + 403567921 = 8190^2 + 20089^2 .

It is a 3-Lehmer number, since φ(470644021) divides (470644021-1)³.

It is a cyclic number.

It is not a de Polignac number, because 470644021 - 2⁵ = 470643989 is a prime.

It is a super-3 number, since 3×470644021³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (470644051) 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, 3430 + ... + 30871.

It is an arithmetic number, because the mean of its divisors is an integer number (117673011).

It is a Poulet number, since it divides 2^470644020-1.

Almost surely, 2^470644021 is an apocalyptic number.

470644021 is the 13721-st heptagonal number.

It is an amenable number.

470644021 is a deficient number, since it is larger than the sum of its proper divisors (48023).

470644021 is a wasteful number, since it uses less digits than its factorization.

470644021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48022.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 470644021 is about 21694.3315407505. The cubic root of 470644021 is about 777.8529717997.

It can be divided in two parts, 4 and 70644021, that added together give a square (70644025 = 8405²).

The spelling of 470644021 in words is "four hundred seventy million, six hundred forty-four thousand, twenty-one".