63436321 has 8 divisors (see below), whose sum is σ = 68753384. Its totient is φ = 58181760.

The previous prime is 63436273. The next prime is 63436327. The reversal of 63436321 is 12363436.

It can be written as a sum of positive squares in 4 ways, for example, as 11025 + 63425296 = 105^2 + 7964^2 .

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

It is not a de Polignac number, because 63436321 - 2⁹ = 63435809 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63436321.

It is not an unprimeable number, because it can be changed into a prime (63436327) 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, 13500 + ... + 17581.

It is an arithmetic number, because the mean of its divisors is an integer number (8594173).

Almost surely, 2^63436321 is an apocalyptic number.

It is an amenable number.

63436321 is a deficient number, since it is larger than the sum of its proper divisors (5317063).

63436321 is a wasteful number, since it uses less digits than its factorization.

63436321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31251.

The product of its digits is 7776, while the sum is 28.

The square root of 63436321 is about 7964.6921472208. The cubic root of 63436321 is about 398.8222041462.

Adding to 63436321 its reverse (12363436), we get a palindrome (75799757).

The spelling of 63436321 in words is "sixty-three million, four hundred thirty-six thousand, three hundred twenty-one".