473521639 has 4 divisors (see below), whose sum is σ = 477136440. Its totient is φ = 469906840.

The previous prime is 473521619. The next prime is 473521651. The reversal of 473521639 is 936125374.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 473521639 - 2⁷ = 473521511 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (473521619) 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, 1807204 + ... + 1807465.

It is an arithmetic number, because the mean of its divisors is an integer number (119284110).

Almost surely, 2^473521639 is an apocalyptic number.

473521639 is a deficient number, since it is larger than the sum of its proper divisors (3614801).

473521639 is a wasteful number, since it uses less digits than its factorization.

473521639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614800.

The product of its digits is 136080, while the sum is 40.

The square root of 473521639 is about 21760.5523597173. The cubic root of 473521639 is about 779.4350714347.

The spelling of 473521639 in words is "four hundred seventy-three million, five hundred twenty-one thousand, six hundred thirty-nine".