63450421 has 4 divisors (see below), whose sum is σ = 63653452. Its totient is φ = 63247392.

The previous prime is 63450419. The next prime is 63450433. The reversal of 63450421 is 12405436.

63450421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 819025 + 62631396 = 905^2 + 7914^2 .

It is a cyclic number.

It is not a de Polignac number, because 63450421 - 2¹ = 63450419 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 (63450221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101046 + ... + 101671.

It is an arithmetic number, because the mean of its divisors is an integer number (15913363).

Almost surely, 2^63450421 is an apocalyptic number.

It is an amenable number.

63450421 is a deficient number, since it is larger than the sum of its proper divisors (203031).

63450421 is a wasteful number, since it uses less digits than its factorization.

63450421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203030.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 63450421 is about 7965.5772546627. The cubic root of 63450421 is about 398.8517507130.

Adding to 63450421 its reverse (12405436), we get a palindrome (75855857).

The spelling of 63450421 in words is "sixty-three million, four hundred fifty thousand, four hundred twenty-one".