63438355 has 4 divisors (see below), whose sum is σ = 76126032. Its totient is φ = 50750680.

The previous prime is 63438337. The next prime is 63438409. The reversal of 63438355 is 55383436.

It is a happy number.

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

It is not a de Polignac number, because 63438355 - 2⁷ = 63438227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6343831 + ... + 6343840.

It is an arithmetic number, because the mean of its divisors is an integer number (19031508).

Almost surely, 2^63438355 is an apocalyptic number.

63438355 is a deficient number, since it is larger than the sum of its proper divisors (12687677).

63438355 is a wasteful number, since it uses less digits than its factorization.

63438355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12687676.

The product of its digits is 129600, while the sum is 37.

The square root of 63438355 is about 7964.8198347483. The cubic root of 63438355 is about 398.8264666658.

The spelling of 63438355 in words is "sixty-three million, four hundred thirty-eight thousand, three hundred fifty-five".