63438009 has 16 divisors (see below), whose sum is σ = 85862400. Its totient is φ = 41657616.

The previous prime is 63438007. The next prime is 63438013. The reversal of 63438009 is 90083436.

It is not a de Polignac number, because 63438009 - 2¹ = 63438007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63438007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73422 + ... + 74280.

It is an arithmetic number, because the mean of its divisors is an integer number (5366400).

Almost surely, 2^63438009 is an apocalyptic number.

It is an amenable number.

63438009 is a deficient number, since it is larger than the sum of its proper divisors (22424391).

63438009 is a wasteful number, since it uses less digits than its factorization.

63438009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 63438009 is about 7964.7981142023. The cubic root of 63438009 is about 398.8257415829.

The spelling of 63438009 in words is "sixty-three million, four hundred thirty-eight thousand, nine".