463489821 has 12 divisors (see below), whose sum is σ = 671601372. Its totient is φ = 308016576.

The previous prime is 463489811. The next prime is 463489837. The reversal of 463489821 is 128984364.

It is a happy number.

463489821 is a `hidden beast` number, since 4 + 634 + 8 + 9 + 8 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 75951225 + 387538596 = 8715^2 + 19686^2 .

It is not a de Polignac number, because 463489821 - 2²¹ = 461392669 is a prime.

It is a super-2 number, since 2×463489821² = 429645628341224082, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (463489811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78376 + ... + 84081.

It is an arithmetic number, because the mean of its divisors is an integer number (55966781).

Almost surely, 2^463489821 is an apocalyptic number.

It is an amenable number.

463489821 is a deficient number, since it is larger than the sum of its proper divisors (208111551).

463489821 is a wasteful number, since it uses less digits than its factorization.

463489821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162780 (or 162777 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 463489821 is about 21528.8137388013. The cubic root of 463489821 is about 773.8914826930.

It can be divided in two parts, 46348 and 9821, that added together give a square (56169 = 237²).

The spelling of 463489821 in words is "four hundred sixty-three million, four hundred eighty-nine thousand, eight hundred twenty-one".