638054359 has 4 divisors (see below), whose sum is σ = 638699200. Its totient is φ = 637409520.

The previous prime is 638054321. The next prime is 638054363. The reversal of 638054359 is 953450836.

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

It is a cyclic number.

It is not a de Polignac number, because 638054359 - 2¹⁷ = 637923287 is a prime.

It is a super-2 number, since 2×638054359² = 814226730077801762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638054309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320934 + ... + 322915.

It is an arithmetic number, because the mean of its divisors is an integer number (159674800).

Almost surely, 2^638054359 is an apocalyptic number.

638054359 is a deficient number, since it is larger than the sum of its proper divisors (644841).

638054359 is an equidigital number, since it uses as much as digits as its factorization.

638054359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644840.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 638054359 is about 25259.7379044201. The cubic root of 638054359 is about 860.8997069733.

The spelling of 638054359 in words is "six hundred thirty-eight million, fifty-four thousand, three hundred fifty-nine".