472737821 has 8 divisors (see below), whose sum is σ = 475387704. Its totient is φ = 470095360.

The previous prime is 472737799. The next prime is 472737823. The reversal of 472737821 is 128737274.

It can be written as a sum of positive squares in 4 ways, for example, as 26894596 + 445843225 = 5186^2 + 21115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-472737821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (472737823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165215 + ... + 168051.

It is an arithmetic number, because the mean of its divisors is an integer number (59423463).

Almost surely, 2^472737821 is an apocalyptic number.

It is an amenable number.

472737821 is a deficient number, since it is larger than the sum of its proper divisors (2649883).

472737821 is a wasteful number, since it uses less digits than its factorization.

472737821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711.

The product of its digits is 131712, while the sum is 41.

The square root of 472737821 is about 21742.5348338228. The cubic root of 472737821 is about 779.0047689301.

The spelling of 472737821 in words is "four hundred seventy-two million, seven hundred thirty-seven thousand, eight hundred twenty-one".